Android：将位图设置为壁纸

Question

我试图将位图图像设置为壁纸。我可以在ImageView中设置位图。但是，当我尝试打开设置为壁纸应用程序崩溃的意图。我已经发布了下面的LogCat。

Intent intent = new Intent(Intent.ACTION_ATTACH_DATA); 
      intent.setType("image/*"); 
      ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
      Bitmap bitmap = wallpaper; 
      bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes); 
      String path = Images.Media.insertImage(getContentResolver(), bitmap , "Title", "Description"); 
      if(path != null) 
      intent.setData(Uri.parse(path)); 
      startActivity(Intent.createChooser(intent, "Choose Application")); 

但我得到这个logcat错误。

12-21 12:13:01.802: E/MediaStore(7761): Failed to insert image 
12-21 12:13:01.802: E/MediaStore(7761): java.io.FileNotFoundException: No such file or directory 
12-21 12:13:01.802: E/MediaStore(7761):  at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:146) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:577) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:673) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.content.ContentResolver.openOutputStream(ContentResolver.java:537) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.content.ContentResolver.openOutputStream(ContentResolver.java:513) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.provider.MediaStore$Images$Media.insertImage(MediaStore.java:891) 
12-21 12:13:01.802: E/MediaStore(7761):  at com.shyam.flickrwallpaperapp.Wallpaper.onClick(Wallpaper.java:164) 
12-21 12:13:01.802: E/MediaStore(7761):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-21 12:13:01.802: E/MediaStore(7761):  at java.lang.reflect.Method.invoke(Method.java:525) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.view.View$1.onClick(View.java:3628) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.view.View.performClick(View.java:4240) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.view.View$PerformClick.run(View.java:17721) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.os.Handler.handleCallback(Handler.java:730) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.os.Handler.dispatchMessage(Handler.java:92) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.os.Looper.loop(Looper.java:137) 
12-21 12:13:01.802: E/MediaStore(7761):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
12-21 12:13:01.802: E/MediaStore(7761):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-21 12:13:01.802: E/MediaStore(7761):  at java.lang.reflect.Method.invoke(Method.java:525) 
12-21 12:13:01.802: E/MediaStore(7761):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
12-21 12:13:01.802: E/MediaStore(7761):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
12-21 12:13:01.802: E/MediaStore(7761):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

1. 我相信你们已经乌尔明显低于已 <uses-permission android:name="android.permission.SET_WALLPAPER"/>

2. 我在这里复制我的代码是Camera.java供您参考

   进口的Java更新。 io.IOException; import java.io.InputStream;

   import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageButton; import android.widget.ImageView;

   public class Camera extends Activity implements View.OnClickListener { ImageView iVReturnedPic; Button btnSetWall; ImageButton iBTakePic; static final int CameraData = 0; 位图bmap;

   @Override 
   protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.photo); 
       initializePhotoVar(); 
       InputStream ipstr = getResources().openRawResource(R.drawable.ic_launcher) ; 
       bmap = BitmapFactory.decodeStream(ipstr); 
   } 
   private void initializePhotoVar() { 
       iVReturnedPic = (ImageView) findViewById(R.id.iV_ReturnedPic); 
       iBTakePic = (ImageButton) findViewById(R.id.iB_TakePic); 
       btnSetWall = (Button) findViewById(R.id.btn_SetWall); 
       btnSetWall.setOnClickListener(this); 
       iBTakePic.setOnClickListener(this); 
   } 
   @SuppressWarnings("deprecation") 
   @Override 
   public void onClick(View view) { 
       switch (view.getId()) { 
       case R.id.btn_SetWall: 
        try { 
         getApplicationContext().setWallpaper(bmap); 
   
        } catch (IOException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
        break; 
       case R.id.iB_TakePic: 
        Intent CamIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
        startActivityForResult(CamIntent, CameraData); 
   
        break; 
       } 
   } 
   
   @Override 
   protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
       // TODO Auto-generated method stub 
       super.onActivityResult(requestCode, resultCode, data); 
       if(resultCode == RESULT_OK){ 
        Bundle extras = (Bundle) data.getExtras(); 
        bmap = (Bitmap) extras.get("data"); 
        iVReturnedPic.setImageBitmap(bmap); 
       } 
   } 
   

   }