我遇到了奇怪的问题,在调用MediaStore.

Images.Media.insertImage时,它有时会返回null uri,但我发现它可以运行一两次,我找不到它的规则.

请给予帮助,非常感谢！

logcat是：

06-18 11:09:24.559: E/MediaStore(13050): Thumbnail is not generated in query() with blockingUri. Return null!

06-18 11:09:24.567: E/MediaStore(13050): Failed to insert image

06-18 11:09:24.567: E/MediaStore(13050): java.lang.NullPointerException

06-18 11:09:24.567: E/MediaStore(13050): at android.provider.MediaStore$Images$Media.StoreThumbnail(MediaStore.java:755)

06-18 11:09:24.567: E/MediaStore(13050): at android.provider.MediaStore$Images$Media.insertImage(MediaStore.java:824)

06-18 11:09:24.567: E/MediaStore(13050): at net.blogjava.mobile.camera.Main.onActivityResult(Main.java:57)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.Activity.dispatchActivityResult(Activity.java:4649)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.ActivityThread.deliverResults(ActivityThread.java:2990)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3037)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.ActivityThread.access$1100(ActivityThread.java:127)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1191)

06-18 11:09:24.567: E/MediaStore(13050): at android.os.Handler.dispatchMessage(Handler.java:99)

06-18 11:09:24.567: E/MediaStore(13050): at android.os.Looper.loop(Looper.java:137)

06-18 11:09:24.567: E/MediaStore(13050): at android.app.ActivityThread.main(ActivityThread.java:4512)

06-18 11:09:24.567: E/MediaStore(13050): at java.lang.reflect.Method.invokeNative(Native Method)

06-18 11:09:24.567: E/MediaStore(13050): at java.lang.reflect.Method.invoke(Method.java:511)

06-18 11:09:24.567: E/MediaStore(13050): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:982)

06-18 11:09:24.567: E/MediaStore(13050): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749)

06-18 11:09:24.567: E/MediaStore(13050): at dalvik.system.NativeStart.main(Native Method)

我的代码是：

import java.io.File;

import android.app.Activity;

import android.content.ContentResolver;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.Toast;

public class Main extends Activity implements OnClickListener

{

public ImageView imageView;

private ImageView ivFocus;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button btnTakePicture = (Button) findViewById(R.id.btnTakePicture);

btnTakePicture.setOnClickListener(this);

imageView = (ImageView) findViewById(R.id.imageview);

ivFocus = new ImageView(this);

Toast.makeText(this, "onCreate", Toast.LENGTH_LONG).show();

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data)

{

if (requestCode == 1)

{

if (resultCode == Activity.RESULT_OK)

{

Bitmap cameraBitmap;

try {

if(data != null)

{

cameraBitmap = (Bitmap) data.getExtras().get("data");

}

else

{

cameraBitmap = BitmapFactory.decodeFile("/sdcard/1test.jpg");

}

imageView.setImageBitmap(cameraBitmap);

ContentResolver cr = getContentResolver();

String ret = MediaStore.Images.Media.insertImage(cr, cameraBitmap, "my_pic", "my picture");

setTitle(ret);

} catch (Exception e) {

Toast.makeText(this, e.getClass()+":"+e.getMessage(), Toast.LENGTH_LONG).show();

}

}

}

super.onActivityResult(requestCode, resultCode, data);

}

@Override

public void onClick(View view)

{

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

//Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File("/sdcard/1test.jpg")));

startActivityForResult(intent, 1);

}

}