我的应用程序在图像视图中显示图像。我希望用户从应用程序本身中选择设置图片作为选项。像这样
如何添加“设置为”弹出菜单,以便用户可以直接将图像设置为墙纸?图像已经存储在 Drawable 文件夹中。
您可以将以下代码用于“将图片设置为”。在这里,我正在截取当前活动的屏幕截图。然后我将该活动存储为位图。之后,我将该活动提供给“设置为选项”的意图
在按钮单击:
OnButtonClick(){
ImageProcessing imageProcessing = new ImageProcessing();
Bitmap bitmap = imageProcessing.takeScreenshot(getWindow().getDecorView().findViewById(R.id.view_thought));
imageProcessing.saveBitmap(bitmap);
Intent intent = imageProcessing.setAsOption(this,imageProcessing.getSavedImagePath());
startActivityForResult(Intent.createChooser(intent, "Set image as"), 200);
}
实现一个新类 ImageProcessing
public class ImageProcessing {
private File imagesPath;
public void saveBitmap(Bitmap bitmap) {
imagesPath = new File(Environment.getExternalStorageDirectory() + "/screenshot.jpg");
FileOutputStream fos;
try {
fos = new FileOutputStream(imagesPath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.e("POS", e.getMessage(), e);
} catch (IOException e) {
Log.e("POS", e.getMessage(), e);
}
}
public File getSavedImagePath(){
imagesPath = new File(Environment.getExternalStorageDirectory() + "/screenshot.jpg");
return imagesPath;
}
public Bitmap takeScreenshot(View rootView) {
rootView.setDrawingCacheEnabled(true);
return rootView.getDrawingCache();
}
public Intent setAsOption(Context cntxt,File imagesPath){
/*File imagesPath = new File(Environment.getExternalStorageDirectory() + "/screenshot.jpg");*/
Intent intent = new Intent(Intent.ACTION_ATTACH_DATA);
if(imagesPath.exists()){
Uri contentUri = FileProvider.getUriForFile(cntxt, BuildConfig.APPLICATION_ID+".Utility.GenericFileProvider",imagesPath);
intent.setDataAndType(contentUri, "image/jpg");
intent.putExtra("mimeType", "image/jpg");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}else {
Toast.makeText(cntxt,"Not a wallpaper",Toast.LENGTH_SHORT).show();
}
return intent;
}
}
在清单中添加:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.SET_WALLPAPER" />