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java.lang.RuntimeException: Unable to resume activity {com.myactivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://media/external/video/media/20101 typ=video/mp4 (has extras) }} to activity {com.myactivity}: java.lang.NullPointerException

这是我选择视频后收到的错误消息。这个应用程序的流程是......我点击文件上传按钮，弹出一个带有浏览按钮的对话框，一个上传按钮和几个必填字段（名称，描述，标签等）。单击浏览按钮后会显示一个文件选择器窗口。浏览按钮的文本将被文件名替换。有时这项工作非常好，但有时会给我一个错误。

我做了一些研究，有人说这是由于内存不足，而有些人说这是因为我试图btnBrowse.setText(filename)在从文件选择器返回后对话框准备好之前做。如果对话准备好进行编辑，有什么方法可以让我有一个监听器来监听？喜欢的if(dialog.isShowing())方法。但我不知道把这张支票放在哪里......

有人可以帮忙吗？（如果有人有内存不足的解决方案，也请指教。）谢谢！

btnBrowse = (Button) dialVideoUpload.findViewById(R.id.btnBrowseVideo);
btnUpload = (Button) dialVideoUpload.findViewById(R.id.btnUpload);
btnBrowse.setOnClickListener(new OnClickListener(){
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        createVideoIntent();
        }           
    });
private void createVideoIntent(){
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.setType("video/*");

    Intent chooser = createVideoChooserIntent(createVideoFromCameraIntent());
    chooser.putExtra(Intent.EXTRA_INTENT, intent);
    startActivityForResult(chooser, FILECHOOSER_REQUESTCODE_VIDEO); 
}
private Intent createVideoChooserIntent(Intent... intents) {
    Intent chooser = new Intent(Intent.ACTION_CHOOSER);
    chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents);
    chooser.putExtra(Intent.EXTRA_TITLE, "Please Choose Your Video");
    return chooser;
}
private Intent createVideoFromCameraIntent() {
    return new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {

    switch (requestCode) {

    case FILECHOOSER_REQUESTCODE_VIDEO:

if (resultCode == Activity.RESULT_OK) {
    String[] projection = { MediaStore.Images.Media.DATA, MediaStore.Video.Media.SIZE, MediaStore.Video.Media.DURATION, MediaStore.Video.Media.TITLE };

    Cursor cursor = managedQuery(intent.getData(), projection, null, null, null);
    cursor.moveToFirst();
    String filePath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
    String fileName = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));
    int fileSize = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE));
    long duration = TimeUnit.MILLISECONDS.toSeconds(cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION)));

    System.out.println("path: " + filePath);
    System.out.println("name: " + fileName);
    System.out.println("size: " + fileSize);
    System.out.println("duration: " + duration);

        //  btnBrowse.setText(fileName); <---this is where I got error

        }
        break;
    }
}

下面是错误信息。

06-12 10:09:46.445: E/AndroidRuntime(31965): FATAL EXCEPTION: main
06-12 10:09:46.445: E/AndroidRuntime(31965): java.lang.RuntimeException: Unable to resume activity {com.myactivity/com.myactivity.Webviewer}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://media/external/video/media/20101 typ=video/mp4 (has extras) }} to activity {com. myactivity /com. myactivity.Webviewer}: java.lang.NullPointerException
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2812)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2851)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2234)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.access$600(ActivityThread.java:139)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1261)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.os.Looper.loop(Looper.java:154)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.main(ActivityThread.java:4945)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at java.lang.reflect.Method.invokeNative(Native Method)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at java.lang.reflect.Method.invoke(Method.java:511)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at dalvik.system.NativeStart.main(Native Method)
06-12 10:09:46.445: E/AndroidRuntime(31965): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://media/external/video/media/20101 typ=video/mp4 (has extras) }} to activity {com. myactivity /com. myactivity.Webviewer}: java.lang.NullPointerException
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.deliverResults(ActivityThread.java:3387)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2793)
06-12 10:09:46.445: E/AndroidRuntime(31965):    ... 12 more
06-12 10:09:46.445: E/AndroidRuntime(31965): Caused by: java.lang.NullPointerException
06-12 10:09:46.445: E/AndroidRuntime(31965):    at com. myactivity.Webviewer.onActivityResult(Webviewer.java:853)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.Activity.dispatchActivityResult(Activity.java:4740)
06-12 10:09:46.445: E/AndroidRuntime(31965):    at android.app.ActivityThread.deliverResults(ActivityThread.java:3383)
06-12 10:09:46.445: E/AndroidRuntime(31965):    ... 13 more
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1 回答 1

0

问题解决了。我在这里接受了达尼塔的建议，它奏效了！！

于 2013-06-12T19:59:40.093 回答