Question

我正在尝试使用intent捕获视频然后将其存储在我的SD卡中，现在我想要的是获取该录制视频的路径，所以为此我编写了以下代码。

对于录制视频，我有以下代码。

record.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                File storageDir = new File(Environment
                        .getExternalStorageDirectory() + "/filetoupload/");
                if (!storageDir.exists()) {
                    storageDir.mkdirs();
                }

                try {
                    imageToStore = new File(storageDir, "" + "video.mp4");
                    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT,
                            Uri.fromFile(imageToStore));
                    startActivityForResult(intent, CAPTURE_VIDEO);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });

为了得到它的路径，我写了下面的代码。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == Activity.RESULT_OK) {
            switch (requestCode) {
            case CAPTURE_VIDEO:

                Uri videoUri = data.getData();
                String videopath = getRealPathFromURI(videoUri);
                System.out.println("Path is" + videopath);
                mEditPath = new EditText(this);
                mEditPath.setText(videopath);
                mEditPath.setVisibility(View.GONE);
                new videopath().execute();

                Intent intent = new Intent(RecordVideo.this,
                        SaveAudioVideo.class);
                startActivity(intent);

                break;

            default:
                break;
            }
        }
    }

方式

public String getRealPathFromURI(Uri contentUri) {
        String[] proj = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(contentUri, proj, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }

我也试过将MediaStore.Images.Media.DATA作为MediaStore.Videos.Media.DATA传递，但这也无效。每当我在录制视频后按下“确定”按钮时，我总是会遇到NullPointerException错误。

02-25 13:10:19.214: E/AndroidRuntime(9075): FATAL EXCEPTION: main
02-25 13:10:19.214: E/AndroidRuntime(9075): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1001, result=-1, data=Intent { dat=file:///mnt/sdcard/filetoupload/video.mp4 }} to activity {iqual.fidol_final/iqual.fidol_final.RecordVideo}: java.lang.NullPointerException
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3135)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:3178)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread.access$1100(ActivityThread.java:134)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1277)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.os.Looper.loop(Looper.java:154)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread.main(ActivityThread.java:4624)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at java.lang.reflect.Method.invokeNative(Native Method)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at java.lang.reflect.Method.invoke(Method.java:511)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at dalvik.system.NativeStart.main(Native Method)
02-25 13:10:19.214: E/AndroidRuntime(9075): Caused by: java.lang.NullPointerException
02-25 13:10:19.214: E/AndroidRuntime(9075):     at iqual.fidol_final.RecordVideo.getRealPathFromURI(RecordVideo.java:206)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at iqual.fidol_final.RecordVideo.onActivityResult(RecordVideo.java:183)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.Activity.dispatchActivityResult(Activity.java:4672)
02-25 13:10:19.214: E/AndroidRuntime(9075):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3131)
02-25 13:10:19.214: E/AndroidRuntime(9075):     ... 11 more

第206行是

int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

和第183行是

 String videopath = getRealPathFromURI(videoUri);

我知道它清楚地表明NullPointerException，但不知怎的，我无法弄明白为什么？

如何在Android中录制视频路径？

0 个答案: