Question

我制作了一个包含按钮的应用程序。此按钮会将我们带到手机的图库，用户可以在其中选择任何图像，该图像将显示在按钮下方的应用程序中。现在我想要一个按钮，将该图像设置为壁纸，我需要保存按钮的代码。这是代码。

public class MainActivity extends ActionBarActivity implements View.OnClickListener {

private static int LOAD_IMAGE_RESULT = 1;

Button b1,b2;
ImageView IV;

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

    b1 = (Button)findViewById(R.id.button);
    IV = (ImageView)findViewById(R.id.imageView);
    b2 = (Button)findViewById(R.id.save);
    b1.setOnClickListener(this);
    b2.setOnClickListener(this);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == LOAD_IMAGE_RESULT && resultCode == RESULT_OK && data != null){
        Uri pick = data.getData();
        String[] images = {MediaStore.Images.Media.DATA};

        Cursor cursor = getContentResolver().query(pick,images,null,null,null);
        cursor.moveToFirst();

        String imagePath = cursor.getString(cursor.getColumnIndex(images[0]));
        IV.setImageBitmap(BitmapFactory.decodeFile(imagePath));
        cursor.close();
    }
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
       case R.id.button:
        Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(intent, LOAD_IMAGE_RESULT);
    break;
        case R.id.save:
            break;

    }
    }

}

Answer 1

如果我错了，我不确定我是否理解你的问题是正确的。您想将所选图像设置为墙纸。

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

try {
   wManager.setBitmap(BitmapFactory.decodeFile(imagePath));
} catch (IOException e) {
   e.printStackTrace();
}

最后，您需要此权限：

<uses-permission android:name="android.permission.SET_WALLPAPER">

从SD卡获取图像并将其设置为壁纸

1 个答案: