I am a novice and I'm just creating a simple Android app in which there are 2 buttons that take you to different pages when clicked, which have different functions.
However, my app crashes on start-up, simply saying
Unfortunately [app name] has stopped
and I don't understand
As I have barely made any changes to my MainActivity.java, the code seems to be well written, and eclipse displays no errors... Any help, please? I have searched around Stack, but I can't find anything specific to this...
Here is my MainActivity.java:
package com.example.helper;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**Called upon when the user clicks the 'Abbreviations' button*/
public void listDefinitions (View view){
Intent intent = new Intent(this, ListDefinitions.class);
startActivity(intent);
}
/**Called upon when the user clicks the 'Assistant' button*/
public void openAssistant (View view){
Intent intent = new Intent(this, Assistant.class);
startActivity(intent);
}
}
Here is my activity_main.xml:
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.legittest.MainActivity" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="#string/intro_title"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="21.5sp" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/title"
android:layout_centerHorizontal="true"
android:layout_marginTop="24dp"
android:text="#string/module_selection"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/definitions_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_below="#+id/textView1"
android:layout_marginLeft="34dp"
android:layout_marginTop="111dp"
android:text="#string/definitions"
android:onClick="listDefinitions" />
<Button
android:id="#+id/assistant_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/definitions_button"
android:layout_centerHorizontal="true"
android:layout_marginTop="56dp"
android:text="#string/assistant"
android:onClick="openAssistant" />
<TextView
android:id="#+id/definitions_explainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/definitions_button"
android:layout_centerHorizontal="true"
android:text="#string/definitions_info"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#color/greycolor" />
<TextView
android:id="#+id/pa_explainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/definitions_explainer"
android:layout_below="#+id/assistant_button"
android:text="#string/assistant_info"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#color/greycolor" />
</RelativeLayout>
My ListDefinitions.java & Assistant.java are untouched at this point.
My Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.theocratichelper"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="19"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ListDefinitions"
android:label="#string/title_activity_list_definitions"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.theocratichelper.MainActivity" />
</activity>
<activity
android:name=".PreachAssistant"
android:label="#string/title_activity_preach_assistant"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.theocratichelper.MainActivity" />
</activity>
</application>
</manifest>
It's your manifest, replace the "last" activity in your manifest by this :
<activity
android:name=".Assistant"
android:label="#string/title_activity_preach_assistant"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.theocratichelper.MainActivity" />
</activity>
Your class name is Assistant and not PreachAssistant i presume.
Just replace the last activity in Android Manifest by this.
<activity
android:name=".Assistant"
android:label="#string/title_activity_preach_assistant"
</activity>
Related
I am beginner in Android system and was trying to create a simple registration from. In this app I created all the needed code but Save button doesn't give any response when clicking.
Here is the code of registration form :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtViewName"
android:text="Student's Name :"
android:layout_marginTop="30dp"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtViewFather"
android:text="Father's Name :"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/txtViewName"
android:layout_marginTop="29dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtViewMother"
android:text="Mother's Name :"
android:layout_below="#+id/txtViewFather"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="29dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtViewAge"
android:text="Age :"
android:layout_below="#+id/txtViewMother"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="29dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/txtViewClass"
android:text="Class :"
android:layout_below="#id/txtViewAge"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="29dp" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:id="#+id/txtEditName"
android:ems="10"
android:layout_toRightOf="#+id/txtViewName"
android:layout_above="#+id/txtViewFather"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:id="#+id/txtEditFather"
android:ems="10"
android:layout_toRightOf="#+id/txtViewFather"
android:layout_above="#+id/txtViewMother"
android:layout_alignParentRight="true"
android:layout_alignLeft="#+id/txtEditName"
android:layout_alignStart="#+id/txtEditName"
android:layout_alignRight="#+id/txtEditName"
android:layout_alignEnd="#+id/txtEditName" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:id="#+id/txtEditMother"
android:ems="10"
android:layout_above="#+id/txtViewAge"
android:layout_toRightOf="#+id/txtViewMother"
android:layout_alignLeft="#+id/txtEditName"
android:layout_alignStart="#+id/txtEditName"
android:layout_alignRight="#+id/txtEditName"
android:layout_alignEnd="#+id/txtEditName" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:id="#+id/txtEditAge"
android:ems="10"
android:layout_above="#+id/txtViewClass"
android:layout_toRightOf="#+id/txtViewAge"
android:layout_alignLeft="#+id/txtEditName"
android:layout_alignStart="#+id/txtEditName"
android:layout_alignRight="#+id/txtEditName"
android:layout_alignEnd="#+id/txtEditName" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="#+id/txtEditClass"
android:layout_alignBottom="#id/txtViewClass"
android:layout_alignLeft="#+id/txtEditName"
android:layout_alignStart="#+id/txtEditName"
android:layout_alignRight="#+id/txtEditName"
android:layout_alignEnd="#+id/txtEditName" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btnBack"
android:text="Back"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btnSave"
android:text="Save"
android:layout_toLeftOf="#+id/btnBack"
android:layout_alignParentBottom="true" />
</RelativeLayout>
and here is the StudentDetail.java class
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import android.view.View.OnClickListener;
import java.util.ArrayList;
public class StudentDetail extends AppCompatActivity implements android.view.View.OnClickListener {
Button btnSave;
Button btnBack;
EditText txtEditName;
EditText txtEditFather;
EditText txtEditMother;
EditText txtEditAge;
EditText txtEditClass;
private int _student_id = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.entry_form);
btnSave = (Button) findViewById(R.id.btnSave);
btnBack = (Button) findViewById(R.id.btnBack);
txtEditName = (EditText) findViewById(R.id.txtEditName);
txtEditFather = (EditText) findViewById(R.id.txtEditFather);
txtEditMother = (EditText) findViewById(R.id.txtEditMother);
txtEditAge = (EditText) findViewById(R.id.txtEditAge);
txtEditClass= (EditText) findViewById(R.id.txtEditClass);
btnSave.setOnClickListener(this);
btnBack.setOnClickListener(this);
_student_id = 0;
Intent intent = getIntent();
_student_id = intent.getIntExtra("student_Id", 0);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onClick(View view) {
if (view == findViewById(R.id.btnSave)){
StudentRepo repo = new StudentRepo(this);
Student student = new Student();
student.name = txtEditName.getText().toString();
student.father_name = txtEditFather.getText().toString();
student.mother_name = txtEditMother.getText().toString();
student.age = Integer.parseInt(txtEditAge.getText().toString());
student.student_class = txtEditClass.getText().toString();
student.student_id =_student_id;
if (_student_id==0){
_student_id = repo.insert(student);
Toast.makeText(this,"New Student Insert",Toast.LENGTH_SHORT).show();
}
} else if(view== findViewById(R.id.btnBack)){
finish();
}
}
}
Here is the AndroidManifest.xml code
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.studentregistration" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.studentregistration.StudentDetail"
android:label="#string/title_activity_entry_form" >
</activity>
</application>
</manifest>
Now when I click on Save button nothing happens..
So can somebody help me out from this situation.
Thanks in advance.
Inside onClick function, use switch-case on the view Id as below:
#override
public void onClick(View view) {
switch(view.getId()) {
case R.id.btnSave:
// Your custom save code goes here ...
break;
case R.id.btnBack:
// ...
break;
}
}
Try this code:
btnSave.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
StudentRepo repo = new StudentRepo(StudentDetail .this);
Student student = new Student();
student.name = txtEditName.getText().toString();
student.father_name = txtEditFather.getText().toString();
student.mother_name = txtEditMother.getText().toString();
student.age = Integer.parseInt(txtEditAge.getText().toString());
student.student_class = txtEditClass.getText().toString();
student.student_id =_student_id;
if (_student_id==0){
_student_id = repo.insert(student);
Toast.makeText(this,"New Student Insert",Toast.LENGTH_SHORT).show();
}
}
});
btnBack.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
finish();
}
});
instead of
btnSave.setOnClickListener(this);
btnBack.setOnClickListener(this);
Oh thanks to all of you to give time to my question and suggesting me to do to fix the bug.
But after reviewing all the code line to line I found that bug myself.
The bug was launching wrong activity in AndroidManifest.xml file.
To fix this I removed the tag from MainActivity tag and placed this to StudentDetail activity tag and everything started working fine.
The updated code was :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.studentregistration" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
</activity>
<activity
android:name="com.example.studentregistration.StudentDetail"
android:label="#string/title_activity_entry_form" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Thanks once again to all.
I've been tring for 2 days to get this to work but I couldn't,I keep getting this exception com.parse.ParseRequest$ParseRequestException: invalid session token.
I'm not an experienced android developper and it's my first time with parse so I'd appreciate it if you can post a detailed answer.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.parse.starter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:name=".ParseApplication"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<meta-data
android:name="com.parse.APPLICATION_ID"
android:value="#string/parse_app_id" />
<meta-data
android:name="com.parse.CLIENT_KEY"
android:value="#string/parse_client_key" />
<activity
android:name=".ParseStarterProjectActivity"
android:label="#string/app_name" >
</activity>
<activity
android:name=".SignUp"
android:label="#string/title_activity_sign_up" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
SignUp.java
package com.parse.starter;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.parse.ParseUser;
import com.parse.SignUpCallback;
public class SignUp extends Activity {
private Button sign_up_b;
private TextView email;
private TextView password;
private TextView password_conf;
private TextView firstName;
private TextView lastName;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sign_up);
sign_up_b = (Button)findViewById(R.id.email_sign_up_button);
email = (TextView)findViewById(R.id.email);
password = (TextView)findViewById(R.id.password);
password_conf = (TextView)findViewById(R.id.confirm_password);
firstName = (TextView)findViewById(R.id.first_name);
lastName = (TextView)findViewById(R.id.last_name);
sign_up_b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
attemptSignUp();
}
});
}
private void attemptSignUp(){
// Create the ParseUser
ParseUser user = new ParseUser();
// Set core properties
user.setUsername(email.getText().toString());
user.setPassword(password.getText().toString());
user.setEmail(email.getText().toString());
// Set custom properties
user.put("lName", lastName.getText().toString());
user.put("fName", firstName.getText().toString());
// Invoke signUpInBackground
user.signUpInBackground(new SignUpCallback() {
#Override
public void done(com.parse.ParseException e) {
if (e == null) {
// Hooray! Let them use the app now.
//Intent i = new Intent(getBaseContext(),Splash.class);
//startActivity(i);
} else {
e.printStackTrace();
// Sign up didn't succeed. Look at the ParseException
// to figure out what went wrong
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.sign_up, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
signup.xml
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.parse.starter.SignUp">
<ScrollView android:id="#+id/sign_up_form" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:id="#+id/sign_up_infos" android:layout_width="match_parent"
android:layout_height="wrap_content" android:orientation="vertical">
<EditText android:id="#+id/first_name" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_first"
android:maxLines="1"
android:singleLine="true" />
<EditText android:id="#+id/last_name" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_last"
android:maxLines="1"
android:singleLine="true" />
<EditText android:id="#+id/email" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_email"
android:inputType="textEmailAddress" android:maxLines="1"
android:singleLine="true" />
<EditText android:id="#+id/password" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_password"
android:inputType="textPassword"
android:maxLines="1" android:singleLine="true" />
<EditText android:id="#+id/confirm_password" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_confirm_password"
android:inputType="textPassword"
android:maxLines="1" android:singleLine="true" />
<Button android:id="#+id/email_sign_up_button" style="?android:textAppearanceSmall"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_marginTop="16dp" android:text="#string/action_sign_up"
android:textStyle="bold" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
I've tried the answer in this posts but I kept getting the same exception
com.parse.ParseRequest$ParseRequestException: invalid session token
For future reference all I had to do is uninstall the application from the emulator than run it again and the problem was solved.
You need to logout the user in Login\Signup view controllers.
Try this in viewDidLoad:
ParseUser.getCurrentUser().logOut();
I am new to android. I want to create a app with different theme for all the activities. I searched a lot for this but i cant find the correct solution.
Here the code
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample.webservice" >
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
>
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.sample.webservice.Usermain"
android:label="#string/title_activity_usermain"
android:theme="#style/UserMainTheme"
android:parentActivityName="com.example.sample.webservice.MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.sample.webservice.MainActivity" />
</activity>
</application>
</manifest>
Styles.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="android:background">#color/white</item>
<item name="android:windowBackground">#color/white</item>
<item name="android:colorBackground">#color/white</item>
</style>
<style name="UserMainTheme" parent="android:Theme.Holo.Light">
<item name="android:background">#color/white</item>
<item name="android:windowBackground">#color/white</item>
<item name="android:colorBackground">#color/white</item>
</style>
</resources>
activity_main.xml
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/imageView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:fontFamily="sans-serif"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/username"
android:id="#+id/textView" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/username"
android:layout_gravity="center_horizontal"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="#string/password"
android:id="#+id/textView2" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/password"
android:layout_gravity="right"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/login"
android:id="#+id/login_button"
android:layout_marginTop="#dimen/login_top_margin"
android:layout_gravity="center_horizontal" />
</LinearLayout>
</RelativeLayout>
activity_usermain.xml
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.sample.webservice.Usermain">
<TextView android:text="#string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
MainActivity.java
package com.example.sample.webservice;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button login = (Button) findViewById(R.id.login_button);
login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setContentView(R.layout.activity_usermain);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Here the screen shot of output:
MainActivity Screen
Usermain Screen
the above two screens having the same theme. Please help me in this thanks in advance
I forgot to start activity with Intent. That's why the style is not applied.
have to change this
public void onClick(View v) {
setContentView(R.layout.activity_usermain);
}
with this one in MainActivity.java
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, Usermain.class);
startActivity(intent);
}
Its working good.
brother i also made an activity that wasn't much complex either just to test this issue but i didn't need to initiate any code. as u have described in the answer. It is working fine for me. All i did was change my Android Manifest file a bit and styles.xml.
after only these 2 changes i was good to go
i'm fairly new to coding but decided i would take the huge plunge into the ocean without knowing how to swim, anyway my button keeps failling to open my new activity when i click on it, instead it just crashes. when I run it on my emulator i get a message saying that it has stopped. I'm using a genymotion emulator and the darcula android studio version.
My main activity.xml:
<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="wrap_content" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity"
android:background="#drawable/background_black">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/unpressed_button"
android:background="#drawable/unpressed"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
style="?android:attr/borderlessButtonStyle" />
</RelativeLayout>
My second Activity.xml:
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:background="#drawable/background_black"
tools:context="quirkykoders.flash_flash.Pressed_Button">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/pressed_button"
android:background="#drawable/pressed"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
style="?android:attr/borderlessButtonStyle" />
</RelativeLayout>
My Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="quirkykoders.flash_flash" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Pressed_Button"
android:label="#string/title_activity_pressed__button" >
<intent-filter>
<action android:name="android.intent.action.PRESSED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
My java
package quirkykoders.flash_flash;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private static Button button_sbm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickButtonListener();
}
public void OnClickButtonListener() {
button_sbm = (Button)findViewById(R.id.unpressed_button);
button_sbm.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent ("quirkykoders.flash_flash.Pressed_Button");
startActivity(intent);
}
}
);
}
}
Any help will be greatly appreciated
When you want to create A new Activity you have to send two parameters in the intent object First is currentActivity name and the second is CallingActivity name
Intent intent=new Intent(MainActivity.this,Pressed_Button.class);
startActivity(intent);
I'm trying to launch my app but i'm getting runtime error all the time.
Definition of the program is: App starts when user clicks button , button will be invisible and count down starts after countdown finish Menu.java will open.
Here is my code below:
Main.java
public class Main extends Activity {
TextView countDown;
int counter;
Intent menuIntent;
Button appStartButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
menuIntent = new Intent("com.example.project_21.MENU");
counter = 5;
countDown = (TextView) findViewById(R.id.countDown);
appStartButton = (Button) findViewById(R.id.appStartButton);
appStartButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
v.setVisibility(View.GONE);
while (counter != 0) {
sleep(1000);
counter--;
countDown.setText(counter + " seconds");
}
startActivity(menuIntent);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void sleep(long mill) {
try {
Thread.sleep(mill);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.project_21"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.project_21.Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.project_21.Menu"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.example.project_21.MENU" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
Activity_main.xml
<LinearLayout 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"
android:background="#drawable/android2"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".Main" >
<TextView
android:id="#+id/startsInfo"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:gravity="center"
android:text="#string/welcome"
android:textSize="30sp" />
<TextView
android:id="#+id/countDown"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/countDown"
android:textSize="45sp" />
<Button
android:id="#+id/appStartButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/appStartButton"
android:textSize="35sp" />
</LinearLayout>
ERROR LOG
The error message states that you are making a call to system services, before they are available. This is because you are calling them in the onCreate() method. Move the calls you are making in your Menu.java class (not included here, so can't tell you exactly which calls you are making) to another lifecycle method - onCreateView() is probably best for an Activity (onAttach() is a good one for Fragments).