私にはトグルボタンが1つだけあるアプリケーションがあります。このトグルボタンの機能は、それを押したときにフラッシュをオンにし、フラッシュをオフにするときに、もう一度押すことです。しかし、私はデバイスがロックされているときや眠っているときや仕事中であってもこれが起きるようにしたい。電源ボタンをダブルクリックするたびに、アプリケーション機能がサービスで実行され、ブロードキャストによってフラッシュがオンになります。どうすればこのことができるか教えてください。電源ボタンをダブルクリックすると、フラッシュがオンになります
MainActivity
package com.example.salal_khan.flashlightservices;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Context context = this;
PackageManager pm = context.getPackageManager();
// if device support camera?
if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
Log.e("err", "Device has no camera!");
return;
}
startService();
}
public void startService() {
startService(new Intent(getBaseContext(), MyService.class));
}
// Method to stop the service
public void stopService() {
stopService(new Intent(getBaseContext(), MyService.class));
}
}
サービス
package com.example.salal_khan.flashlightservices;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.Binder;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;
/**
* Created by salal-khan on 12/1/2017.
*/
public class MyService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Let it continue running until it is stopped.
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
final IntentFilter filter = new
IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
final BroadcastReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
}
}
ブロードキャストレシーバー
package com.example.salal_khan.flashlightservices;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.hardware.Camera;
import android.util.Log;
import android.hardware.Camera.Parameters;
/**
* Created by salal-khan on 12/1/2017.
*/
public class ScreenReceiver extends BroadcastReceiver {
public static boolean wasScreenOn = true;
Camera camera;
boolean isON = false;
int number_of_clicks = 0;
boolean thread_started = false;
final int DELAY_BETWEEN_CLICKS_IN_MILLISECONDS = 550;
@Override
public void onReceive(final Context context, final Intent intent) {
++number_of_clicks;
if (!thread_started) {
new Thread(new Runnable() {
@Override
public void run() {
thread_started = true;
try {
Thread.sleep(DELAY_BETWEEN_CLICKS_IN_MILLISECONDS);
if (number_of_clicks == 1) {
} else if (number_of_clicks == 2) {
if (isON) {
if (camera == null) {
camera = Camera.open();
}
Parameters p = camera.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(p);
camera.stopPreview();
isON = false;
} else {
if (camera == null) {
camera = Camera.open();
}
Parameters p = camera.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(p);
camera.startPreview();
isON = true;
}
}
number_of_clicks = 0;
thread_started = false;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
Log.e("LOB", "onReceive");
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
wasScreenOn = false;
}
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON))
{
wasScreenOn = true;
}
else if (intent.getAction().equals(Intent.ACTION_USER_PRESENT)) {
Log.e("LOB", "userpresent");
Log.e("LOB", "wasScreenOn" + wasScreenOn);
}
}
}
マニフェスト
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.salal_khan.flashlightservices">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.PREVENT_POWER_KEY" />
<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>
<service android:name=".MyService" />
</application>
</manifest>
キャプチャ画像
package com.example.salal_khan.SecuriteCameraServices;
import android.content.BroadcastReceiver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.net.Uri;
import android.os.Handler;
import android.os.Looper;
import android.provider.MediaStore;
import android.util.Log;
import android.hardware.Camera.Parameters;
import android.view.SurfaceView;
import android.widget.Toast;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
/**
* Created by salal-khan on 12/1/2017.
*/
public class ScreenReceiver extends BroadcastReceiver {
public static boolean wasScreenOn = true;
Camera camera = null;
boolean isON = false;
int number_of_clicks = 0;
boolean thread_started = false;
final int DELAY_BETWEEN_CLICKS_IN_MILLISECONDS = 550;
Context contexts;
@Override
public void onReceive(final Context context, final Intent intent) {
contexts = context;
++number_of_clicks;
final SurfaceView mview = new SurfaceView(context);
if (camera==null) {
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
}
if (!thread_started) {
new Thread(new Runnable() {
@Override
public void run() {
thread_started = true;
try {
Thread.sleep(DELAY_BETWEEN_CLICKS_IN_MILLISECONDS);
if (number_of_clicks == 1) {
} else if (number_of_clicks == 2) {
if (isON) {
Camera.Parameters parameters = camera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG);
camera.setParameters(parameters);
Handler h = new Handler(Looper.getMainLooper());
h.post(new Runnable() {
public void run() {
try {
camera.setPreviewDisplay(mview.getHolder());
camera.startPreview();
camera.takePicture(null, null, photoCallback);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
} else {
Camera.Parameters parameters = camera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG);
camera.setParameters(parameters);
Handler h = new Handler(Looper.getMainLooper());
h.post(new Runnable() {
public void run() {
try {
camera.setPreviewDisplay(mview.getHolder());
camera.startPreview();
camera.takePicture(null, null, photoCallback);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
}
number_of_clicks = 0;
thread_started = false;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
Log.e("LOB", "onReceive");
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
wasScreenOn = false;
}
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
wasScreenOn = true;
} else if (intent.getAction().equals(Intent.ACTION_USER_PRESENT)) {
Log.e("LOB", "userpresent");
Log.e("LOB", "wasScreenOn" + wasScreenOn);
}
}
Camera.PictureCallback photoCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
Uri uriTarget = contexts.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new ContentValues());
OutputStream imageFileOS;
try {
imageFileOS = contexts.getContentResolver().openOutputStream(uriTarget);
imageFileOS.write(data);
imageFileOS.flush();
imageFileOS.close();
// Toast.makeText(contexts.getApplicationContext(), "Image saved: " + uriTarget.toString(), Toast.LENGTH_LONG).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
};
}
マニフェスト
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.salal_khan.SecuriteCameraServices">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.PREVENT_POWER_KEY" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.CAMERA" />
<application
android:allowBackup="true"
android:name=".MyApplication"
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="com.example.salal_khan.SecuriteCameraServices.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.example.salal_khan.SecuriteCameraServices.MyService" />
</application>
</manifest>