墙纸不正确地放在设备屏幕上，它可以变焦或裁剪

Question

我使用链接图像创建了带有滑行的壁纸应用程序。我有三个按钮可以将图像设置为墙纸，锁定屏幕和home_screen在设备屏幕上。但是，当我将此图像设置为墙纸时，它要么缩放或裁剪。我希望图像适合每个Android屏幕尺寸。

@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onClick(View view) {
    switch (view.getId()) {
        case R.id.button2:            

            Bitmap bitmap1 = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
            WallpaperManager manager1 = WallpaperManager.getInstance(getApplicationContext());
            try {
                manager1.setBitmap(bitmap1, null, false, WallpaperManager.FLAG_SYSTEM);
                Toast.makeText(getApplicationContext(), "Set HomeScreen Successfully ", Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(this, "Wallpaper not load yet!", Toast.LENGTH_SHORT).show();
            }
            break;
        case R.id.button3:              

            Bitmap bitmap2 = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
            WallpaperManager manager2 = WallpaperManager.getInstance(getApplicationContext());
            try {
                manager2.setBitmap(bitmap2, null, false, WallpaperManager.FLAG_LOCK);
                Toast.makeText(getApplicationContext(), "Set LockScreen Successfully ", Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(this, "Wallpaper not load yet!", Toast.LENGTH_SHORT).show();
            }
            break;
        case R.id.button4:               

            Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
            WallpaperManager manager = WallpaperManager.getInstance(getApplicationContext());
            try {
                manager.setBitmap(bitmap);
                Toast.makeText(getApplicationContext(), "Set Wallpaper Successfully ", Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(this, "Wallpaper not load yet!", Toast.LENGTH_SHORT).show();
            }

    }
}

}