Android implements screenshots and saves screenshots to specified files

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

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public class JavaActivity extends AppCompatActivity {
 
  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    (savedInstanceState);
    setContentView(.drawable_activity);
 
    AppCompatActivity activity = this;
 
    findViewById().setOnClickListener(new () {
      @Override
      public void onClick(View v) {
        File file = new File((Environment.DIRECTORY_PICTURES), "");
        Bitmap bitmap = screenShot(activity);
        try {
          if (!())
            ();
 
          boolean ret = save(bitmap, file, , true);
          if (ret) {
            (getApplicationContext(), "Screenshots are maintained to" + (), Toast.LENGTH_SHORT).show();
          }
        } catch (Exception e) {
          ();
        }
      }
    });
  }
 
  /**
    * Save the picture to file file.
    *
    * @param src Source image
    * @param file file to save to
    * @param format
    * @param recycle Whether to recycle
    * @return true Success false Failed
    */
  public static boolean save(Bitmap src, File file,  format, boolean recycle) {
    if (isEmptyBitmap(src))
      return false;
 
    OutputStream os;
    boolean ret = false;
    try {
      os = new BufferedOutputStream(new FileOutputStream(file));
      ret = (format, 100, os);
      if (recycle && !())
        ();
    } catch (IOException e) {
      ();
    }
 
    return ret;
  }
 
 
  /**
    * Get the current screenshot, not including the Status Bar.
    *
    * @param activity activity
    * @return Bitmap
    */
  public static Bitmap screenShot(Activity activity) {
    View view = ().getDecorView();
    (true);
    ();
    Bitmap bmp = ();
    int statusBarHeight = getStatusBarHeight(activity);
    int width = (int) getDeviceDisplaySize(activity)[0];
    int height = (int) getDeviceDisplaySize(activity)[1];
 
    Bitmap ret = (bmp, 0, statusBarHeight, width, height - statusBarHeight);
    ();
 
    return ret;
  }
 
  public static float[] getDeviceDisplaySize(Context context) {
    Resources resources = ();
    DisplayMetrics dm = ();
    int width = ;
    int height = ;
 
    float[] size = new float[2];
    size[0] = width;
    size[1] = height;
 
    return size;
  }
 
  public static int getStatusBarHeight(Context context) {
    int height = 0;
    int resourceId = ().getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
      height = ().getDimensionPixelSize(resourceId);
    }
 
    return height;
  }
 
  /**
    * Whether the Bitmap object is empty.
    */
  public static boolean isEmptyBitmap(Bitmap src) {
    return src == null || () == 0 || () == 0;
  }
}