我是android studio(和java)的新手,我正在尝试制作视频处理应用程序。我希望程序从用户库中上传视频,然后每秒拍摄一段视频并将其保存到阵列中。从逻辑上讲,我写的代码对我来说很有意义并且没有错误,但是当我在我的三星平板电脑上运行应用程序时,它会在拍摄视频后崩溃。我认为setDataSource无法找到正确的数据源,但我不知道如何从视频中传递数据。有人可以帮忙吗?
继承我的代码:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
savedimage = (ImageView) findViewById(R.id.imageView);
}
public void activity(View view) {
startActivityForResult(new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.INTERNAL_CONTENT_URI), GET_FROM_GALLERY);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
Uri videouri = data.getData();
retriever.setDataSource(String.valueOf(videouri));
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
long timeInmillisec = Long.parseLong(time);
long seconds = timeInmillisec / 1000;
ArrayList<Bitmap> mylist = new ArrayList<Bitmap>();
for (int i = 0; i < seconds; i++) {
Bitmap bArray = retriever.getFrameAtTime(100000 * i, MediaMetadataRetriever.OPTION_CLOSEST);
mylist.add(bArray);
}
}
答案 0 :(得分:0)
由于您的videouri
是Uri
,请尝试拨打void setDataSource (Context context, Uri uri)
而不是void setDataSource (String path)
:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// check for resultCode & requestCode
if (resultCode == RESULT_OK) {
if (requestCode == GET_FROM_GALLERY) {
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
Uri videouri = data.getData();
// "videouri" is Uri, call setDataSource (Context context, Uri uri) instead
retriever.setDataSource(this, videouri);
.....
}
}