我正在使用录制视频的意图。
所以我在recordVideo按钮的单击
上使用以下代码Videofilepath = "";
Intent intent = new Intent(android.provider.MediaStore.ACTION_VIDEO_CAPTURE);
startActivityForResult(intent,REQUEST_VIDEO_CAPTURED);
和onActivityResult
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
switch (requestCode) {
case IMAGE_PICK:
this.imageFromGallery(resultCode, data);
break;
case IMAGE_CAPTURE:
this.imageFromCamera(resultCode, data);
break;
case REQUEST_VIDEO_CAPTURED:
this.videoFromCamera(resultCode, data);
break;
default:
break;
}
}
}
private void videoFromCamera(int resultCode, Intent data) {
uriVideo = data.getData();
uploadedFileName="";
Constant.IS_FILE_ATTACH = true;
Toast.makeText(PDFActivity.this, uriVideo.getPath(), Toast.LENGTH_LONG)
.show();
String[] filePathColumn = { MediaStore.Video.Media.DATA };
Cursor cursor = getContentResolver().query(uriVideo, filePathColumn,
null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
Videofilepath = filePath;
System.out.println("Videofilepath filepath from camera : "
+ Videofilepath);
cursor.close();
File f = new File(filePath);
System.out.println("file created ? : " + f.exists());
Bitmap bMap = null;
do {
try {
// Simulate network access.
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (!f.exists());
bMap = ThumbnailUtils.createVideoThumbnail(filePath,
MediaStore.Video.Thumbnails.MICRO_KIND);
do {
try {
// Simulate network access.
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (bMap == null);
imageOrVideo = "video";
attachmentvalue.setImageBitmap(bMap);
}
此代码与三星galaxy Tab正常工作。但是没有使用Nexus 7.可能是Nexus 7有前置摄像头。 但我得到的结果数据意图是null onActivityResult。
所以在我的Logcat中我得到以下异常： -
08-08 12:51:31.160: E/AndroidRuntime(10899): FATAL EXCEPTION: main
08-08 12:51:31.160: E/AndroidRuntime(10899): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=200, result=-1, data=Intent { }} to activity {com.example.activity/com.example.PDFActivity}: java.lang.NullPointerException
答案 0 :(得分：8)
最后我解决了这个问题。
Nexus 7将视频存储在DCIM目录中，但onActivityResults将其返回null。它是Nexus 7设备的文档问题。
所以用intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);修复此问题
代码如下： -
记录按钮上的代码点击： -
intent = new Intent(android.provider.MediaStore.ACTION_VIDEO_CAPTURE);
fileUri = getOutputMediaFile(MEDIA_TYPE_VIDEO); // create a file to save the video in specific folder (this works for video only)
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high
// start the Video Capture Intent
startActivityForResult(intent, REQUEST_VIDEO_CAPTURED_NEXUS);
代码 - onActivityResult的case块： -
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
switch (requestCode) {
case REQUEST_VIDEO_CAPTURED_NEXUS:
this.videoFromCameraNexus(resultCode, data);
break;
default:
break;
}
}
}
// videoFromCameraNexus方法
private void videoFromCameraNexus(int resultCode, Intent data) {
if(fileUri != null) {
Log.d(TAG, "Video saved to:\n" + fileUri);
Log.d(TAG, "Video path:\n" + fileUri.getPath());
Log.d(TAG, "Video name:\n" + getName(fileUri));
// use uri.getLastPathSegment() if store in folder
//use the file Uri.
}
}
使用以下方法获取输出媒体文件uri
public Uri getOutputMediaFile(int type)
{
// To be safe, you should check that the SDCard is mounted
if(Environment.getExternalStorageState() != null) {
// this works for Android 2.2 and above
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), "SMW_VIDEO");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if (! mediaStorageDir.exists()) {
if (! mediaStorageDir.mkdirs()) {
Log.d(TAG, "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
if(type == MEDIA_TYPE_VIDEO) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"VID_"+ timeStamp + ".mp4");
} else {
return null;
}
return Uri.fromFile(mediaFile);
}
return null;
}
它适用于我。
答案 1 :(得分：2)
感谢您的解决方法！
以下是更多拉丝和复制粘贴的可用代码：
/**
* Create intent to take video.
*/
public static Intent createTakeVideoIntent() {
Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
Uri uri = getOutputVideoUri(); // create a file to save the video in specific folder
if (uri != null) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
}
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high
return intent;
}
@CheckForNull
private static Uri getOutputVideoUri() {
if (Environment.getExternalStorageState() == null) {
return null;
}
File mediaStorage = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "YOUR_APP_VIDEO");
if (!mediaStorage.exists() &&
!mediaStorage.mkdirs()) {
Log.e(YourApplication.TAG, "failed to create directory: " + mediaStorage);
return null;
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US).format(new Date());
File mediaFile = new File(mediaStorage, "VID_" + timeStamp + ".mp4");
return Uri.fromFile(mediaFile);
}
在Nexus 4 v4.3 JWR66Y上测试
答案 2 :(得分：0)
制作一个分叉并通过存储到永久目录来解决问题，该目录在收到结果后仍然可用。