我浏览过并尝试过如何将录制的视频显示到ImageView而没有成功的多个建议。
此代码适用于拍摄图像并显示图像。视频也会被录制并保存到手机中，但不会显示在ImageView中。有关如何修改我的代码以使视频出现在ImageView中的任何建议吗？
除了：RESULT_LOAD_VID部分之外，一切似乎都能正常工作，该部分应该将选定或录制的视频显示给ImageView。
我收到的错误是：“SkImageDecoder :: Factory返回null”
根据我的理解，这意味着无论出于何种原因，所选/录制的视频位置都没有传递到RESULT_LOAD_VID部分。
感谢任何帮助。
这是我目前的代码：
public class Media extends AppCompatActivity{
private static int RESULT_LOAD_IMG = 1;
private static int RESULT_LOAD_VID = 1;
String imgDecodableString;
private String selectedImagePath = "";
private static final int CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE = 200;
final private int CAPTURE_IMAGE = 2;
private Uri fileUri;
private ImageView mImageView;
Toolbar toolbar;
private String imgPath;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.toolbarmedia, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.camera:
AlertDialog.Builder builder = new AlertDialog.Builder(Media.this);
// builder.setTitle("Choose Image Source");
builder.setItems(new CharSequence[] { "Take a Photo", "Choose from Gallery" },
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent1.putExtra(MediaStore.EXTRA_OUTPUT, setImageUri());
startActivityForResult(intent1, CAPTURE_IMAGE);
break;
case 1:
// Create intent to Open Image applications like Gallery, Google Photos
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
break;
default:
break;
}
}
});
builder.show();
return true;
case R.id.video:
AlertDialog.Builder builder2 = new AlertDialog.Builder(Media.this);
// builder.setTitle("Choose Image Source");
builder2.setItems(new CharSequence[]{"Take a Video", "Select Video from Phone"},
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
//create new Intent
Intent intent_video = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO); // create a file to save the video
intent_video.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
intent_video.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high
// start the Video Capture Intent
startActivityForResult(intent_video, CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);
break;
case 1:
// Create intent to Open Image applications like Gallery, Google Photos
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_VID);
break;
default:
break;
}
}
});
builder2.show();
return true;
case R.id.mic:
return true;
default:
// If we got here, the user's action was not recognized.
// Invoke the superclass to handle it.
return super.onOptionsItemSelected(item);
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_media);
toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mImageView = (ImageView) findViewById(R.id.media_display);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
// When an Image is picked
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK && null != data) {
// Get the Image from data
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
// Get the cursor
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
// Move to first row
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imgDecodableString = cursor.getString(columnIndex);
cursor.close();
ImageView imgView = (ImageView) findViewById(R.id.media_display);
// Set the Image in ImageView after decoding the String
imgView.setImageBitmap(BitmapFactory.decodeFile(imgDecodableString));
} else if (requestCode == CAPTURE_IMAGE) {
selectedImagePath = getImagePath();
System.out.println("path" + selectedImagePath);
mImageView.setImageBitmap(decodeStream(selectedImagePath));
} else if(requestCode == RESULT_LOAD_VID && resultCode == RESULT_OK && null != data){
// Get the Image from data
Uri selectedVideo = data.getData();
String[] filePathColumn = {MediaStore.Video.Media.DATA};
//Get the cursor
Cursor cursor = getContentResolver().query(selectedVideo, filePathColumn, null, null, null);
// Move to first row
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imgDecodableString = cursor.getString(columnIndex);
cursor.close();
ImageView vidView = (ImageView) findViewById(R.id.media_display);
// Set the Image in ImageView after decoding the String
vidView.setImageBitmap(BitmapFactory.decodeFile(imgDecodableString));
}else if (requestCode == CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// Video captured and saved to fileUri specified in the Intent
Toast.makeText(this, "Video Saved to Phone", Toast.LENGTH_LONG).show();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the video capture
} else {
// Video capture failed, advise user
Toast.makeText(this, "Video capture failed.",
Toast.LENGTH_LONG).show();
super.onActivityResult(requestCode, resultCode, data);
}
}
} catch (Exception e) {
Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
.show();
}
}
public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;
/** Create a file Uri for saving an image or video */
private static Uri getOutputMediaFileUri(int type){
return Uri.fromFile(getOutputMediaFile(type));
}
/** Create a File for saving an image or video */
private static File getOutputMediaFile(int type){
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "MyCameraApp");
// 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("MyCameraApp", "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_IMAGE){
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"IMG_"+ timeStamp + ".jpg");
} else if(type == MEDIA_TYPE_VIDEO) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"VID_"+ timeStamp + ".mp4");
} else {
return null;
}
return mediaFile;
}
public Uri setImageUri() {
File file = new File(Environment.getExternalStorageDirectory(), "image" + new Date().getTime() + ".png");
Uri imgUri = Uri.fromFile(file);
this.imgPath = file.getAbsolutePath();
return imgUri;
}
public String getImagePath() {
return imgPath;
}
public Bitmap decodeStream(String path) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 70;
// Find the correct scale value. It should be the power of
// 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE
&& o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeFile(path, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
}
答案 0 :(得分：5)
如果您有视频文件的路径，请使用此方法以位图格式创建缩略图。
public Bitmap createVideoThumbNail(String path){
return ThumbnailUtils.createVideoThumbnail(path,MediaStore.Video.Thumbnails.MICRO_KIND);
}
并在图片视图中使用它，如： -
ivVideoThumbnail.setImageBitmap(createVideoThumbNail(videoPath));
答案 1 :(得分：2)
extractYoutubeId(url)从YoutubeVideo Url 要获取youtube视频的图片，请使用指定的链接，并将youtube id放在该网址中，如下所示："http://img.youtube.com/vi/"+extractYoutubeId(url)+"/0.jpg"
Youtube_Video_thumnail
package com.app.download_video_demo;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;
import com.squareup.picasso.Picasso;
// get Picasso jar file and put that jar file in libs folder
public class Youtube_Video_thumnail extends Activity
{
ImageView iv_youtube_thumnail,iv_play;
String videoId;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
super.setContentView(R.layout.youtube_video_activity);
init();
try
{
videoId=extractYoutubeId("http://www.youtube.com/watch?v=t7UxjpUaL3Y");
Log.e("VideoId is->","" + videoId);
String img_url="http://img.youtube.com/vi/"+videoId+"/0.jpg"; // this is link which will give u thumnail image of that video
// picasso jar file download image for u and set image in imagview
Picasso.with(Youtube_Video_thumnail.this)
.load(img_url)
.placeholder(R.drawable.ic_launcher)
.into(iv_youtube_thumnail);
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
}
public void init()
{
iv_youtube_thumnail=(ImageView)findViewById(R.id.img_thumnail);
iv_play=(ImageView)findViewById(R.id.iv_play_pause);
}
// extract youtube video id and return that id
// ex--> "http://www.youtube.com/watch?v=t7UxjpUaL3Y"
// videoid is-->t7UxjpUaL3Y
public String extractYoutubeId(String url) throws MalformedURLException {
String query = new URL(url).getQuery();
String[] param = query.split("&");
String id = null;
for (String row : param) {
String[] param1 = row.split("=");
if (param1[0].equals("v")) {
id = param1[1];
}
}
return id;
}
}
youtube_video_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/webvideo_layout2"
android:layout_width="250dp"
android:layout_height="180dp"
android:layout_gravity="center"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
>
<ImageView
android:id="@+id/img_thumnail"
android:layout_width="250dp"
android:layout_height="180dp"
android:layout_centerInParent="true"
android:scaleType="fitXY" />
<ImageView
android:id="@+id/iv_play_pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/icn_play" />
</RelativeLayout>
</LinearLayout>