Android 'set As Wallpaper‘功能

Question

我正在开发一个应用程序，在其中我有一个图片库，当我点击任何图像时，它将以完全模式打开。但我想要的set As Wallpaper功能像安卓默认图库：

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我知道这可以通过定制代码(设置壁纸和裁剪图像)来完成。但是我想把这个图像传递给android默认的壁纸设置器，这样android就可以管理裁剪和设置壁纸任务。我怎么能这么做？我如何将该图像传递给android默认的剪纸机？

Answer 1

您可以通过为结果启动活动并在结果中检索它来启动裁剪意图，然后使用壁纸管理器类。像这样

Uri imgUri=Uri.parse("android.resource://your.package.name/"+R.drawable.image); 
Intent intent = new Intent("com.android.camera.action.CROP");  
intent.setDataAndType(imgUri, "image/*");  
intent.putExtra("crop", "true");  
intent.putExtra("aspectX", 1);  
intent.putExtra("aspectY", 1);  
intent.putExtra("outputX", 80);  
intent.putExtra("outputY", 80);  
intent.putExtra("return-data", true);
startActivityForResult(intent, REQUEST_CODE_CROP_PHOTO);

并在onResult函数中使用壁纸管理器

还要记住，它取决于设备是否支持它。此意图操作不是内部API的一部分。一些制造商提供自己的图库应用程序，因此无法知道用户的设备是否会识别其意图。

Answer 2

这是我从URL.You下载图像的代码，它可以找到有用的东西。别忘了添加存储、壁纸和互联网所需的权限。

             @Override
public void onClick(View v) {
    setWall(v);
  }
 });

 if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        if (shouldShowRequestPermissionRationale(
                Manifest.permission.READ_EXTERNAL_STORAGE)) {
            // Explain to the user why we need to read the contacts
        }

        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);

        // MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE is an
        // app-defined int constant that should be quite unique

        return;
    }
}




public void setWall(View view) {

    new SetWallpaperTask().execute();
}

public class SetWallpaperTask extends AsyncTask <String, Void, Bitmap> {
    String image = getIntent().getStringExtra("image");
    ProgressDialog progressDialog;
    @TargetApi(Build.VERSION_CODES.KITKAT)
    @Override
    protected Bitmap doInBackground(String... params) {
        Bitmap result= null;
        try {
            result = Picasso.with(getApplicationContext())
                    .load(image)
                    .get();
        } catch (IOException e) {
            e.printStackTrace();
        }

        WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());



        //new Intent(wallpaperManager.getCropAndSetWallpaperIntent(getImageUri(result,getApplicationContext())));


        return result;
    }



    @TargetApi(Build.VERSION_CODES.KITKAT)
    @Override
    protected void onPostExecute (Bitmap result) {
        super.onPostExecute(result);

        WallpaperManager wallpaperManager = WallpaperManager.getInstance(getBaseContext());
      {
          startActivity(new Intent(wallpaperManager.getCropAndSetWallpaperIntent(getImageUri(result,getApplicationContext()))));

          //  wallpaperManager.setBitmap(result);

            progressDialog.dismiss();
          //  Toast.makeText(getApplicationContext(), "Set wallpaper successfully", Toast.LENGTH_SHORT).show();

    }}

    @Override
    protected void onPreExecute () {
        super.onPreExecute();

        progressDialog = new ProgressDialog(Wallpaper_activity.this);
        progressDialog.setMessage("Please wait...");
        progressDialog.setCancelable(false);
        progressDialog.show();
    }
}
private Uri getImageUri(Bitmap inImage, Context inContext) {
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
    String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(),
            inImage, "Title", null);
    return Uri.parse(path);
}