Call measure how far you dragged in Android

Call measure how far you dragged in Android - java

I made an application running in the background, and I want to add a function to measure the slide on the screen. I'll leave you the code for both, and someone can help me. I'm a beginner and I've been looking all over trying to solve this without results.
I know the post is too long, but I did not know how to shorten it so you can understand it.
The code for running the application in the background
App.java
package com.codinginflow.foregroundserviceexample;
import android.app.Application;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.os.Build;
public class App extends Application {
public static final String CHANNEL_ID = "exampleServiceChannel";
#Override
public void onCreate() {
super.onCreate();
createNotificationChannel();
}
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel serviceChannel = new NotificationChannel(
CHANNEL_ID,
"Example Service Channel",
NotificationManager.IMPORTANCE_DEFAULT
);
NotificationManager manager =
getSystemService(NotificationManager.class);
manager.createNotificationChannel(serviceChannel);
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.codinginflow.foregroundserviceexample">
<application
android:name=".App"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".ExampleService" />
</application>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
</manifest>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:padding="16dp"
tools:context="com.codinginflow.foregroundserviceexample.MainActivity">
<EditText
android:id="#+id/edit_text_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Input" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="startService"
android:text="Start Service" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="stopService"
android:text="Stop Service" />
</LinearLayout>
ExampleService.java
package com.codinginflow.foregroundserviceexample;
import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import static com.codinginflow.foregroundserviceexample.App.CHANNEL_ID;
public class ExampleService extends Service {
#Override
public void onCreate() {
super.onCreate();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
String input = intent.getStringExtra("inputExtra");
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,
0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(this,
CHANNEL_ID)
.setContentTitle("Example Service")
.setContentText(input)
.setSmallIcon(R.drawable.ic_android)
.setContentIntent(pendingIntent)
.build();
startForeground(1, notification);
return START_NOT_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
MainActivity.java
package com.codinginflow.foregroundserviceexample;
import android.content.Intent;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
private EditText editTextInput;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextInput = findViewById(R.id.edit_text_input);
}
public void startService(View v) {
String input = editTextInput.getText().toString();
Intent serviceIntent = new Intent(this, ExampleService.class);
serviceIntent.putExtra("inputExtra", input);
ContextCompat.startForegroundService(this, serviceIntent);
}
public void stopService(View v) {
Intent serviceIntent = new Intent(this, ExampleService.class);
stopService(serviceIntent);
}
}
Code for sliding measurement
Point p1;
Point p2;
View view = new View(this);
view.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN)
p1 = new Point((int) event.getX(), (int) event.getY());
else if(event.getAction() == MotionEvent.ACTION_UP)
p2 = new Point((int) event.getX(), (int) event.getY());
return false;
}
});
Can someone call me this code in my app?

Related

How Do I Update The Widget's TextViewText From A Broadcast Receiver?

I am trying to update my widget's TextView Text from a BroadcastReceiver on ClickPendingIntent. I am not having much luck. Can I please get some help with this? In my ActionReceiver.class which extends BroadcastReceiver, I know that I need to update the widget after changing the textview text. I am not sure how to do that. Unfortunately, I can't use statics without crashing the app and widget. Here is my code...
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mywidget">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<receiver android:name=".MyWidget">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="#xml/my_widget_info" />
</receiver>
<activity
android:name=".MainActivity"
android:screenOrientation="locked">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ActionReceiver"/>
</application>
</manifest>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="#+id/myTV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textAlignment="center"
android:text="#string/default_tv_text"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#android:color/black"/>
<EditText
android:id="#+id/myET"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/myTV"
android:inputType="text"
android:hint="#string/default_et_text"
android:textAlignment="center"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#android:color/black"
tools:ignore="Autofill" />
<View
android:id="#+id/myView"
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_below="#id/myET"/>
<Button
android:id="#+id/myButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/myView"
android:layout_centerHorizontal="true"
android:text="#string/button_text"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#android:color/black"/>
</RelativeLayout>
my_widget.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="180dp"
android:layout_height="110dp"
android:padding="#dimen/widget_margin">
<TextView
android:id="#+id/appwidget_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_margin="8dp"
android:contentDescription="#string/appwidget_text"
android:text="#string/appwidget_text"
android:textColor="#android:color/white"
android:textSize="24sp"
android:textStyle="bold|italic" />
</RelativeLayout>
strings.xml
<resources>
<string name="app_name">My Widget</string>
<string name="default_tv_text">Hello World!</string>
<string name="default_et_text">Enter Something To Change The Text Above.</string>
<string name="button_text">OK</string>
<string name="appwidget_text">EXAMPLE</string>
<string name="appwidget_text_changed">Hello World!</string>
<string name="add_widget">Add widget</string>
</resources>
MainActivity.class
package com.example.mywidget;
import androidx.appcompat.app.AppCompatActivity;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
TextView tv;
EditText et;
Button btn;
#Override
protected void onDestroy() {
super.onDestroy();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = findViewById(R.id.myTV);
et = findViewById(R.id.myET);
btn = findViewById(R.id.myButton);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String getEditText = et.getText().toString();
if (!getEditText.isEmpty()) {
tv.setText(getEditText);
Toast.makeText(getBaseContext(), "Text Changed!", Toast.LENGTH_SHORT).show();
}
}
});
}
}
MyWidget.class
package com.example.mywidget;
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.widget.RemoteViews;
import android.widget.Toast;
import androidx.annotation.Nullable;
public class MyWidget extends AppWidgetProvider {
public void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.my_widget);
views.setTextViewText(R.id.appwidget_text, widgetText);
Intent actionIntent = new Intent(context, ActionReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, actionIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.appwidget_text, pi);
appWidgetManager.updateAppWidget(appWidgetId, views);
}
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
}
ActionReceiver.class
package com.example.mywidget;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;
import android.widget.Toast;
public class ActionReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
CharSequence getNewText = context.getString(R.string.appwidget_text_changed);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.my_widget);
views.setTextViewText(R.id.appwidget_text, getNewText); // The widget needs to be updated from here with something like this updateAppWidget(context, appWidgetManager, appWidgetId);
Toast.makeText(context, "Widget Updated!", Toast.LENGTH_SHORT);
}
}
My Updated MyWidget.class
public class MyWidget extends AppWidgetProvider {
public void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.my_widget);
views.setTextViewText(R.id.appwidget_text, widgetText);
Intent actionIntent = new Intent(context, MyWidget.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, actionIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.appwidget_text, pi);
appWidgetManager.updateAppWidget(appWidgetId, views);
}
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
#Override
public void onReceive(Context context, Intent intent) {
AppWidgetManager appWM = AppWidgetManager.getInstance(context);
ComponentName myWidget = new ComponentName(context, MyWidget.class);
int[] appWIDs = appWM.getAppWidgetIds(myWidget);
CharSequence getNewText = context.getString(R.string.appwidget_text_changed);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.my_widget);
views.setTextViewText(R.id.appwidget_text, getNewText);
if (appWIDs == null && appWIDs.length > 0) {
onUpdate(context, appWM, appWIDs);
Toast.makeText(context, "Widget Updated!", Toast.LENGTH_SHORT).show();
}
}
}
It's still not working for me. When I click the textview on the widget, it just launches the app. I'm trying to get the textview to change the default word "Example" to "Hello World" when the textview is clicked on. I've been trying for hours figuring this out.

i'm creating notification alarm app and the notification not created

i create this app but it is not send a notification at the time choosen please can any one help me to solve this problem
xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal"
tools:context=".MainActivity">
<EditText
android:id="#+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter your task"
android:layout_marginBottom="20dp"/>
<TimePicker
android:id="#+id/timePicker"
android:layout_width="300dp"
android:layout_height="342dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:layout_marginTop="30dp">
<Button
android:id="#+id/setBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="set"
android:layout_marginRight="20dp"/>
<Button
android:id="#+id/cancelBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="cancel"/>
</LinearLayout>
and this is the MainActivity class for app:
package com.examble.alarmlast;
import androidx.appcompat.app.AppCompatActivity;
import android.app.AlarmManager;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TimePicker;
import android.widget.Toast;
import java.util.Calendar;
public class MainActivity extends AppCompatActivity {
private AlarmManager alarmMgr;
private PendingIntent alarmIntent;
Button setbtn;
TimePicker timePicker;
EditText edt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setbtn = findViewById(R.id.setBtn);
edt=findViewById(R.id.editText);
timePicker=findViewById(R.id.timePicker);
final int hour = timePicker.getCurrentHour();
final int minute = timePicker.getCurrentMinute();
setbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
AlarmManager alarm = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
intent.putExtra("todo", edt.getText().toString());
alarmIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
// Set the alarm to start at 8:30 a.m.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY,hour );
calendar.set(Calendar.MINUTE, minute);
// setRepeating() lets you specify a precise custom interval--in this case,
// 20 minutes.
alarm.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1000 * 60 * 20,
alarmIntent);
Toast.makeText(MainActivity.this, "Done!", Toast.LENGTH_SHORT).show();
}
});
}
}
and this is the AlarmReceiver class for app:
package com.examble.alarmlast;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;
import static androidx.core.content.ContextCompat.getSystemService;
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String message = intent.getStringExtra("todo");
// When notification is tapped, call MainActivity.
Intent mainIntent = new Intent(context, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, mainIntent, 0);
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.O)
{
NotificationChannel notificationChannel = new NotificationChannel("n","n",
NotificationManager.IMPORTANCE_DEFAULT);
NotificationManager myNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
myNotificationManager.createNotificationChannel(notificationChannel);
}
// Prepare notification.
NotificationCompat.Builder builder = new NotificationCompat.Builder(context,"n")
.setContentText(message)
.setContentTitle("It's Time!")
.setSmallIcon(android.R.drawable.ic_dialog_info)
.setAutoCancel(true)
.setContentText(message)
.setWhen(System.currentTimeMillis())
.setContentIntent(contentIntent)
.setPriority(Notification.PRIORITY_MAX)
.setDefaults(Notification.DEFAULT_ALL);
// Notify
NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
notificationManagerCompat.notify(999,builder.build());
}
}
AndroidManifast:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.abeer.alarmlast">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".AlarmReceiver" />
</application>
</manifest>

Receiver doesnt know when to invoke itself.
<receiver android:name=".AlarmReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
You need to specify when to invoke it.

First activity is only working on my Android project

I am new to android and java programming so i try to learn from doing few projects and i am stuck with this problem.
When i try to run the app only first activity is working and second activity is not working.
Where did i missed on this app?
I am confuse and two java projects are working but the only first activity works.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.android_examples.wallpaper_android_examplescom.MainActivity">
<ImageView
android:id="#+id/imageView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="#drawable/img76"
android:layout_above="#+id/btn_right"
android:layout_alignParentTop="true"
android:layout_marginBottom="30dp"
android:scaleType="fitXY" />
<Button
android:id="#+id/btn_right"
style="#style/Widget.AppCompat.Button.Colored"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/btn_left"
android:layout_alignBottom="#+id/btn_left"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginEnd="42dp"
android:layout_marginRight="42dp"
android:text="RIGHT" />
<Button
android:id="#+id/btn_left"
style="#style/Widget.AppCompat.Button.Colored"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="43dp"
android:layout_marginLeft="43dp"
android:layout_marginBottom="100dp"
android:text="LEFT" />
<Button
android:id="#+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="0dp"
android:text="Click here to Set this image as Wallpaper in android programmatically" />
</RelativeLayout>
MainActivity.java
package com.android_examples.wallpaper_android_examplescom;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button button;
ImageView imageView;
WallpaperManager wallpaperManager ;
Bitmap bitmap1, bitmap2 ;
DisplayMetrics displayMetrics ;
int width, height;
BitmapDrawable bitmapDrawable ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button)findViewById(R.id.button);
imageView = (ImageView)findViewById(R.id.imageView);
wallpaperManager = WallpaperManager.getInstance(getApplicationContext());
bitmapDrawable = (BitmapDrawable) imageView.getDrawable();
bitmap1 = bitmapDrawable.getBitmap();
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
GetScreenWidthHeight();
SetBitmapSize();
wallpaperManager = WallpaperManager.getInstance(MainActivity.this);
try {
wallpaperManager.setBitmap(bitmap2);
wallpaperManager.suggestDesiredDimensions(width, height);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
public void GetScreenWidthHeight(){
displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
width = displayMetrics.widthPixels;
height = displayMetrics.heightPixels;
}
public void SetBitmapSize(){
bitmap2 = Bitmap.createScaledBitmap(bitmap1, width, height, false);
}
}
login.java
package com.android_examples.wallpaper_android_examplescom;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class login extends AppCompatActivity {
private ImageView imageView;
private Button btn_right, btn_left;
private int current_image_index;
private int[] images = {R.drawable.img76, R.drawable.img2};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DisplayImage();
SwitchButton();
}
void DisplayImage(){
imageView = (ImageView)findViewById(R.id.imageView);
}
void SwitchButton(){
btn_right = (Button)findViewById(R.id.btn_right);
btn_left = (Button)findViewById(R.id.btn_left);
btn_right.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
current_image_index++;
current_image_index = current_image_index % images.length;
imageView.setImageResource(images[current_image_index]);
}
});
btn_left.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
current_image_index--;
if(current_image_index < 0){
current_image_index = images.length - 1;
}
imageView.setImageResource(images[current_image_index]);
}
}
);
}
}
Androidmanifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android_examples.wallpaper_android_examplescom">
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.SET_WALLPAPER_HINTS"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".login">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity">
</activity>
</application>
</manifest>

Where ever you want to call the next activity use this:-
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);

Theres no code to navigate to MainActivity
Trigger below code
private void startMainActivity(){
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
}

You have to start your second activity
startActivity(new Intent(getApplicationContext(), MainActivity.class));
make sure that you have added second activity in manifest file

void SwitchButton() {
btn_right = (Button) findViewById(R.id.btn_right);
btn_left = (Button) findViewById(R.id.btn_left);
btn_right.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
current_image_index++;
current_image_index = current_image_index % images.length;
imageView.setImageResource(images[current_image_index]);
startMainPage();
}
});
btn_left.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
current_image_index--;
if (current_image_index < 0) {
current_image_index = images.length - 1;
}
imageView.setImageResource(images[current_image_index]);
startMainPage();
}
}
);
}
private void startMainPage() {
Intent intent = new Intent(Login.this, MainActivity.class);
startActivity(intent);
}

write this code in your click listener:
btn_right.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
current_image_index++;
current_image_index = current_image_index % images.length;
imageView.setImageResource(images[current_image_index]);
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
}
});

An android application that chooses photo from gallery and uploads into the firebase batabase

Like I said in my title I am trying to learn to use databases in android application. So I thought of creating a sample application that takes photos from gallery and uploads the image into the firebase database. However, my application collapses itself after I select a photo from gallery.
Here is my android manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.trump.demo_cameraapp">
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
</application>
</manifest>
Here is my layout file, activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width = "match_parent"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView1"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="2">
</ImageView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose Photo!"
android:textColor="#color/Blue"
android:id="#+id/chooseButton"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text = "Upload Photo!"
android:textColor="#color/colorPrimaryDark"
android:id="#+id/uploadButton"/>
</LinearLayout>
I have the following lines of code in MainActivity
package com.example.trump.demo_cameraapp;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final int PICK_IMAGE_REQUEST = 1;
int TAKE_PHOTO_CODE = 0;
public static int count = 0;
private ImageView mImageView;
private StorageReference storage;
private ProgressDialog mProgressDialog;
public static final int GALLERY_INTENT = 2;
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Here, we are making a folder named picFolder to store
// pics taken by the camera using this application.
mImageView = (ImageView) findViewById(R.id.imageView1);
Button choose = (Button) findViewById(R.id.chooseButton);
choose.setOnClickListener(this);
Button upload = (Button) findViewById(R.id.uploadButton);
upload.setOnClickListener(this);
}
private void showFileChooser(){
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select an image"),PICK_IMAGE_REQUEST);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data!=null && data.getData()!=null) {
Log.d("ResultOK", String.valueOf(RESULT_OK));
Log.d("CameraDemo", "Pic saved");
mProgressDialog.setMessage("Uploading...");
mProgressDialog.show();
Uri uri = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
mImageView.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
StorageReference filepath = storage.child("images").child(uri.getLastPathSegment());
filepath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>(){
#Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_SHORT).show();
mProgressDialog.dismiss();
}
});
}
}
#Override
public void onClick(View view) {
if(view.getId() == R.id.chooseButton){
showFileChooser();
}else if(view.getId() == R.id.uploadButton){
}
}
}
I have not yet written codes to upload the image on firebase database. All I am trying to do right now is to display the image I picked from gallery in the imageview of my app. However, like I said before it's not displaying anything right now and as soon as I choose some photo from gallery it collapses. Any help regarding the issue would be very appreciated.

I think there is no issue with your image picker code, what i found a problem is that you are using mProgressDialog without initializing it in the onCreate() method. So what is recommend is that you first initialize mProgressDialog object in your onCreate() method right after you the initialization of mImageView. And i hope that your application will not collapse now.

Admob Banner Ad is not displaying on Android App

I have a Android App. I need to integrate admob. I have included the following code but banner ad is not displaying in main layout please help regarding this your answers will be appreciated and it would be a great help. thank you.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_layout"
android:background="#drawable/hanumanji1"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HanumanActivity" >
<Button
android:id="#+id/pause_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#drawable/circle_shape_drawable"
android:text="#string/pau"
android:textColor="#ffff00" />
<Button
android:id="#+id/play_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#drawable/circle_shape_drawable"
android:gravity="center"
android:text="#string/pl"
android:textColor="#ffff00" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/circle_shape_drawable"
android:gravity="center"
android:text="#string/de"
android:textColor="#ffff00" />
<com.google.ads.AdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="xxxxxxxxxxxxxxxxxxxxxxxxxxxx"
ads:loadAdOnCreate="true"/>
</RelativeLayout>
MainActivity.java
package e.hanuman;
import e.hanuman.Constants;
import java.util.ArrayList;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import com.google.ads.AdRequest;
import com.google.ads.AdSize;
import com.google.ads.AdView;
import e.hanuman.R;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.animation.ValueAnimator;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AccelerateInterpolator;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
public class HanumanActivity extends Activity implements OnClickListener{
Button play_button, pause_button, button1 ;
private AdView adView;
MediaPlayer player;
private int[] LEAVES = {
R.drawable.leaf_green,
R.drawable.leaf_red,
R.drawable.leaf_yellow,
R.drawable.leaf_other,
};
private Rect mDisplaySize = new Rect();
private RelativeLayout mRootLayout;
private ArrayList<View> mAllImageViews = new ArrayList<View>();
private float mScale;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hanuman);
// Create the adView
adView = new AdView(this, AdSize.BANNER, "xxxxxxxxxxxxxxxxxxxxxxxxxxxx");
// Lookup your LinearLayout assuming it's been given
// the attribute android:id="#+id/mainLayout"
RelativeLayout layout = (RelativeLayout)findViewById(R.id.main_layout);
// Add the adView to it
layout.addView(adView);
// Initiate a generic request to load it with an ad
adView.loadAd(new AdRequest());
AdView adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest();
//adRequest.setTesting(true);
button1=(Button)findViewById(R.id.button1);
button1.setOnClickListener(this);
TelephonyManager mgr = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
if(mgr != null) {
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
getInit();
Display display = getWindowManager().getDefaultDisplay();
display.getRectSize(mDisplaySize);
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
mScale = metrics.density;
mRootLayout = (RelativeLayout) findViewById(R.id.main_layout);
new Timer().schedule(new ExeTimerTask(), 0, 5000);
}
PhoneStateListener phoneStateListener = new PhoneStateListener() {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
player.pause();
} else if(state == TelephonyManager.CALL_STATE_IDLE) {
//Not in call: Play music
player.start();
} else if(state == TelephonyManager.CALL_STATE_OFFHOOK) {
//A call is dialing, active or on hold
player.pause();
}
super.onCallStateChanged(state, incomingNumber);
}
};
public void startAnimation(final ImageView aniView) {
aniView.setPivotX(aniView.getWidth()/2);
aniView.setPivotY(aniView.getHeight()/2);
long delay = new Random().nextInt(Constants.MAX_DELAY);
final ValueAnimator animator = ValueAnimator.ofFloat(0, 1);
animator.setDuration(Constants.ANIM_DURATION);
animator.setInterpolator(new AccelerateInterpolator());
animator.setStartDelay(delay);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
int angle = 50 + (int)(Math.random() * 101);
int movex = new Random().nextInt(mDisplaySize.right);
#Override
public void onAnimationUpdate(ValueAnimator animation) {
float value = ((Float) (animation.getAnimatedValue())).floatValue();
aniView.setRotation(angle*value);
aniView.setTranslationX((movex-40)*value);
aniView.setTranslationY((mDisplaySize.bottom + (150*mScale))*value);
}
});
animator.start();
}
private Handler mHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
int viewId = new Random().nextInt(LEAVES.length);
Drawable d = getResources().getDrawable(LEAVES[viewId]);
LayoutInflater inflate = LayoutInflater.from(HanumanActivity.this);
ImageView imageView = (ImageView) inflate.inflate(R.layout.ani_image_view, null);
imageView.setImageDrawable(d);
mRootLayout.addView(imageView);
mAllImageViews.add(imageView);
LayoutParams animationLayout = (LayoutParams) imageView.getLayoutParams();
animationLayout.setMargins(0, (int)(-150*mScale), 0, 0);
animationLayout.width = (int) (60*mScale);
animationLayout.height = (int) (60*mScale);
startAnimation(imageView);
}
};
private class ExeTimerTask extends TimerTask {
#Override
public void run() {
// we don't really use the message 'what' but we have to specify something.
mHandler.sendEmptyMessage(Constants.EMPTY_MESSAGE_WHAT);
}
}
public void getInit() {
play_button = (Button) findViewById(R.id.play_button);
pause_button = (Button) findViewById(R.id.pause_button);
play_button.setOnClickListener(this);
pause_button.setOnClickListener(this);
player = MediaPlayer.create(this, R.raw.hanu);
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.play_button:
player.start();
break;
case R.id.pause_button:
player.pause();
break;
case R.id.button1:
button1Click();
break;
}}
private void button1Click() {
// TODO Auto-generated method stub
startActivity(new Intent("e.hanuman.details"));
}
#Override
public void onBackPressed(){
if(player != null && player.isPlaying())
player.stop();
finish();
}
#Override
public void onDestroy() {
if (adView != null) {
adView.destroy();
}
super.onDestroy();
}
}
MANIFEST XML
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="e.hanuman"
android:versionCode="4"
android:versionName="4.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/hanuman"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity android:theme="#android:style/Theme.NoTitleBar.Fullscreen"
android:name="e.hanuman.Splash" android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="e.hanuman.HanumanActivity"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar.Fullscreen"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="details"
android:theme="#android:style/Theme.NoTitleBar.Fullscreen"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="e.hanuman.details" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>
</application>
</manifest>

Change com.google.android.ads to com.google.android.gms.ads In your main activity and your manifest because you're using the old ads, use the .gms change your xml too, to the .gms adview.

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