Take/Сохранить скриншот в фоновом андроида

Question

Мое приложение работает отлично на переднем плане, но я хочу осуществить, чтобы принять screenshot в фоновом режиме тоже .. им застрял, как это осуществить ...

я думаю, что услуга может быть полезным ....

public class MainActivity extends Activity implements OnClickListener { 
    ListView listview; 
    List<ParseObject> ob; 
    ProgressDialog mProgressDialog; 
    ArrayAdapter<String> adapter; 
    EditText et; 
    Button bt, bt2; 
    String[] values; 
    List<String> list11 = new ArrayList<String>(); 
    private SensorManager mSensorManager; 
    private float mAccel; // acceleration apart from gravity 
    private float mAccelCurrent; // current acceleration including gravity 
    private float mAccelLast; // last acceleration including gravity 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); 
     mSensorManager.registerListener(mSensorListener, 
       mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), 
       SensorManager.SENSOR_DELAY_NORMAL); 
     mAccel = 0.00f; 
     mAccelCurrent = SensorManager.GRAVITY_EARTH; 
     mAccelLast = SensorManager.GRAVITY_EARTH; 

    } 

    private final SensorEventListener mSensorListener = new SensorEventListener() { 

     public void onSensorChanged(SensorEvent se) { 
      float x = se.values[0]; 
      float y = se.values[1]; 
      float z = se.values[2]; 
      mAccelLast = mAccelCurrent; 
      mAccelCurrent = (float) Math.sqrt((double) (x * x + y * y + z * z)); 
      float delta = mAccelCurrent - mAccelLast; 
      mAccel = mAccel * 0.9f + delta; // perform low-cut filter 
      if (mAccel > 2) { 
       Toast toast = Toast.makeText(getApplicationContext(), 
         "Device has shaken.", Toast.LENGTH_LONG); 
       toast.show(); 
       save(); 

      } 
     } 

     public void onAccuracyChanged(Sensor sensor, int accuracy) { 
     } 
    }; 

    public void save() { 
     final String SCREENSHOTS_LOCATIONS = Environment 
       .getExternalStorageDirectory().toString() + "/screenshots/"; 

     // Get device dimmensions 
     Display display = getWindowManager().getDefaultDisplay(); 
     Point size = new Point(); 
     display.getSize(size); 

     // Get root view 
     View view = getWindow().getDecorView().getRootView(); 

     // Create the bitmap to use to draw the screenshot 
     final Bitmap bitmap = Bitmap.createBitmap(size.x, size.y, 
       Bitmap.Config.ARGB_4444); 
     final Canvas canvas = new Canvas(bitmap); 

     // Get current theme to know which background to use 
     final Activity activity = MainActivity.this; 
     final Theme theme = activity.getTheme(); 
     final TypedArray ta = theme 
       .obtainStyledAttributes(new int[] { android.R.attr.windowBackground }); 
     final int res = ta.getResourceId(0, 0); 
     final Drawable background = activity.getResources().getDrawable(res); 

     // Draw background 
     background.draw(canvas); 

     // Draw views 
     view.draw(canvas); 

     // Save the screenshot to the file system 
     FileOutputStream fos = null; 
     try { 
      final File sddir = new File(SCREENSHOTS_LOCATIONS); 
      if (!sddir.exists()) { 
       sddir.mkdirs(); 
      } 
      fos = new FileOutputStream(SCREENSHOTS_LOCATIONS 
        + System.currentTimeMillis() + ".jpg"); 
      if (fos != null) { 
       if (!bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) { 
       } 
       fos.flush(); 
       fos.close(); 
      } 

     } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     mSensorManager.registerListener(mSensorListener, 
       mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), 
       SensorManager.SENSOR_DELAY_NORMAL); 
    } 

    @Override 
    protected void onPause() { 
     mSensorManager.unregisterListener(mSensorListener); 
     super.onPause(); 
    } 

    @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); 
    } 

} 

Answer 1

вы можете использовать этот код для принятия скриншот,

View screen = getWindow().getDecorView().getRootView(); 
    screen.setDrawingCacheEnabled(true); 
    Bitmap bitmap = screen.getDrawingCache(); 

    File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "yourpath"); 
    if (!mediaStorageDir.exists()) { 
     if (!mediaStorageDir.mkdirs()) { 
      Log.d("Error", "path not created"); 
     } 
    } 
    String filePath = Environment.getExternalStorageDirectory() + File.separator + "yourpath" + "/" + "fileName" + ".png"; 
    try { 
     bitmap.compress(CompressFormat.PNG, 100, new FileOutputStream(newFile(filePath))); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } 

не забудьте добавить это разрешение ypur manifest.xml файл

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>