How to make intent call to any class in flutter plugin using java.
I am facing some errors OnMethodCall how to use intent inside call method in flutter plugin.
I searched on different platform for to get help about this problem.I am fail to find.
My Imports :
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import androidx.annotation.NonNull;
import androidx.core.content.ContextCompat;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;
import io.flutter.plugin.common.PluginRegistry.Registrar;
import static androidx.core.content.ContextCompat.createDeviceProtectedStorageContext;
import static androidx.core.content.ContextCompat.startActivity;
OnMethodCall
#Override
public void onMethodCall(#NonNull MethodCall call, #NonNull Result result) {
if (call.method.equals("getPlatformVersion")) {
Intent intent = new Intent("android.intent.action.MAIN");
intent.setClassName("com.android.settings", "com.android.settings.RadioInfo");
startActivity(intent);
} else {
result.notImplemented();
}
}
Related
package com.example.twapp.Observer;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.widget.Button;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import com.example.twapp.Notify;
import com.example.twapp.R;
import com.example.twapp.testReceiver;
public class ConcreteObserverA extends AppCompatActivity implements Observer {
NotificationManager notificationManager;
NotificationChannel channel;
Context context = this;
private String observerState;
private ConcreteSubject concreteSubject; // 持有指向 ConcreteSubject 物件的 reference
public ConcreteObserverA(ConcreteSubject concreteSubject) {
this.concreteSubject = concreteSubject;
}
#RequiresApi(api = Build.VERSION_CODES.O)
#Override
public void update() {
setContentView(R.layout.activity_notify);
notificationManager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
channel=new NotificationChannel("ID","com.example.twapp",NotificationManager.IMPORTANCE_HIGH);
notificationManager.createNotificationChannel(channel);
Intent intent = new Intent(context,testReceiver.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context,1,intent,PendingIntent.FLAG_UPDATE_CURRENT);
Notification.Builder builder = new Notification.Builder(context);
builder.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("訊息")
.setContentText("跌倒啦~")
.setChannelId("ID");
Notification notification=builder.build();
notificationManager.notify(1,notification);
}
}
I use the Observer pattern to implement notifications, but I have problems when my concreateObserver wants to print notifications.
When I delete this method. Simple print is feasible.Because I can't think of a way. So come to ask everyone android studio master.
I'm trying to make a service that works 24/7 and it's been working until I updated to Android 12. I've checked the new foreground restrictions but still don't understand why it isn't working since I'm starting it from an activity.
ACTIVITY
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class TestActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
startForegroundService(new Intent(TestActivity.this, TestService.class));
}
}
SERVICE
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.media.MediaBrowserCompat;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.NotificationCompat;
import androidx.media.MediaBrowserServiceCompat;
import java.util.List;
public class TestService extends MediaBrowserServiceCompat {
#Override
public BrowserRoot onGetRoot(#NonNull String clientPackageName, int clientUid, #Nullable Bundle rootHints) { return null; }
#Override
public void onLoadChildren(#NonNull String parentId, #NonNull Result<List<MediaBrowserCompat.MediaItem>> result) { result.sendResult(null); }
#Override
public int onStartCommand(Intent ii, int flags, int startId) {
//CREATE NOTI CHANNEL
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(
"test", "Test Notifications",
NotificationManager.IMPORTANCE_HIGH);
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(channel);
}
//CREATE NOTI
Notification notification = new NotificationCompat.Builder(this, "test")
.setSmallIcon(R.drawable.icon)
.setContentTitle("title")
.setContentText("test")
.setChannelId("test")
.setOngoing(true)
.setSilent(true)
.build();
//START FOREGROUND
startForeground(101, notification);
return START_STICKY;
}
}
I tried creating a new app with just these lines of code and it works fine so it must be something else making the service close after a minute.
Turns out samsung put my app on deep sleep which caused it to close itself if not used for a minute. Also thanks to the people who took their time to try and help.
Even though you are correct in wanting a foreground Service here, it seems as if you want it to stay alive whenever you app in the background, or not running at all, as you don't intend your app to be running 24/7, do you?
Since it seems as if you're trying to use a MediaBrowserServiceCompat in your example, I would suggest you do so using a companion instance of a MediaSessionCompat in order to have the media session control the lifecycle of your Service on it's own.
Implementing a media Service is not the most straightforward task in Android; they're still trying to fix some of its prevailing issues with the latest release of Android 13. Therefore, I would also suggest you follow this official Android guide if you're attempting to create an audio app with a media foreground Service.
I am working on an Android app android 10 and nordic nrf52840 which is advertising at channel 37,38,39 I want to get the manufacturer data from my nordic bluetooth device. Like the picture shown below. Now I can scan and find my device, but I don't know how to get manufacturer data.
package com.example.test373839;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.BatchingListUpdateCallback;
import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private BluetoothAdapter mBluetoothAdapter=null;
private BluetoothManager mbluetoothManager=null;
private BroadcastReceiver mReceiver=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnScan=(Button)findViewById(R.id.button);
mBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
}
public void StartScan(View view) {
Log.d("Button","click");
checkBTPermission();
mBluetoothAdapter.startDiscovery();
IntentFilter dicoveryDeviceIntent=new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mBroadcastreceiver,dicoveryDeviceIntent);
}
private void checkBTPermission(){
if(Build.VERSION.SDK_INT>Build.VERSION_CODES.LOLLIPOP){
int pc=this.checkSelfPermission("Manifest.permission.ACCESS_FINE_LOCATION");
pc+=this.checkSelfPermission("Manifest.permission.ACCESS_COARSE_LOCATION");
if(pc!=0){
this.requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION},1001);
}else {
Log.d("Bluetooth","checkBT permission");
}
}
}
final private BroadcastReceiver mBroadcastreceiver=new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
//Finding devices
if (BluetoothDevice.ACTION_FOUND.equals(action))
{
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Add the name and address to an array adapter to show in a ListView
Log.d("Bluetooth",device.getAddress()+":"+device.getName());
}
}
};
}
I'm trying to follow Facebook's docs for Sharing a Sticker Asset on Android without any luck. Basically when executed the app flickers and then crash.
Could someone look at this code and point out why the app crashes after calling activity.startActivityForResult(intent, 0);? (debugging the code using logcat, I can see the code is definitely executing startActivityForResult)
package com.app.my;
import android.net.Uri;
import android.content.Intent;
import android.app.Activity;
import android.util.Log;
import com.facebook.react.bridge.ReadableMap;
import com.facebook.react.bridge.Callback;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
public class InstagramStoriesModule extends ReactContextBaseJavaModule {
private static ReactApplicationContext reactContext;
InstagramStoriesModule(ReactApplicationContext context) {
super(context);
reactContext = context;
}
//Mandatory function getName that specifies the module name
#Override
public String getName() {
return "InstagramStories";
}
//Custom function that we are going to export to JS
#ReactMethod
public void share(ReadableMap options) {
String stickerImage = "https://www.example.com/image.jpeg";
String backgroundColor = "#000000";
Uri stickerAssetUri = Uri.parse(stickerImage);
Intent intent = new Intent("com.instagram.share.ADD_TO_STORY");
intent.setType("image/jpeg");
intent.putExtra("interactive_asset_uri", stickerAssetUri);
intent.putExtra("top_background_color", backgroundColor);
intent.putExtra("bottom_background_color", backgroundColor);
Activity activity = reactContext.getCurrentActivity();
activity.grantUriPermission("com.instagram.android", stickerAssetUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
if (activity.getPackageManager().resolveActivity(intent, 0) != null) {
activity.startActivityForResult(intent, 0);
}
}
}
I went over all the related posts and no answer was found.
I'm trying to take a picture with the Camera library and it fails on take picture method.
What the code is suppose to do, is when pressed a button to show an image over the ImageView (simple as this sounds).
The app crashes when it gets to take picture, stack trace attached at end.
MainActivity.java
package com.drivesafe.drivesafe;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.*;
import android.view.*;
import android.widget.*;
import android.hardware.Camera;
import java.util.Timer;
public class MainActivity extends AppCompatActivity {
public static ProgressDialog detectionProgressDialog;
public static ImageView imageView;
public static Camera camera;
public static Camera.PictureCallback pictureCallback;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.imageView = (ImageView)findViewById(R.id.imageView1);
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
take_picture();
}
});
this.detectionProgressDialog = new ProgressDialog(this);
this.pictureCallback = new PhotoHandler(getApplicationContext());
this.initFrontCamera();
}
private void take_picture() {
camera.startPreview();
camera.takePicture(null, null, null, this.pictureCallback);
}
private void initFrontCamera() {
camera = Camera.open(1); //front camera
}
}
PhotoHandler.java
package com.drivesafe.drivesafe;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.AsyncTask;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.ImageView;
import android.widget.Toast;
public class PhotoHandler implements PictureCallback {
private final Context context;
public PhotoHandler(Context context) {
this.context = context;
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
MainActivity.imageView.setImageBitmap(bitmap);
}
}
Stack Trace:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.drivesafe.drivesafe, PID: 28460
java.lang.RuntimeException: takePicture failed
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1545)
at com.drivesafe.drivesafe.MainActivity.take_picture(MainActivity.java:43)
at com.drivesafe.drivesafe.MainActivity.access$000(MainActivity.java:13)
at com.drivesafe.drivesafe.MainActivity$1.onClick(MainActivity.java:29)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22433)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6121)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Application terminated.
Permissions
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera"
android:required="true" />
I would love some help please.