第一种形式：(网络的URL)
Intent it = new Intent();
(Intent.ACTION_VIEW);
((""));
startActivity(it);
第二种形式：(本地URL)
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = ("file:///sdcard/foo.mp3");
(uri, "audio/mp3");
startActivity(intent);
可是有时候我们加载本地URL的形式却是这样子的：/storage/emulated/0/video/test.MP4
如果还是用()可能在一些手机调用不到系统的播放器(播放不了)，解决办法如下：
把()改为(new File(URL));
有一种需求是获取本地视频的缩略图，网上有很多办法获取，在这里我只介绍一种，本人觉得是最有用，最有效的：(异步，缓存加载)
这里有个工具类：
/**
* Created by CWJ on 2016/4/15.
*/
public class VideoThumbnailLoader {
private static VideoThumbnailLoader mInstance;
private Map> caches;
private List mTaskQueue;
public static VideoThumbnailLoader getInstance(){
if (mInstance == null){
mInstance = new VideoThumbnailLoader();
}
return mInstance;
}
private VideoThumbnailLoader(){
caches = new HashMap<>();
mTaskQueue = new ArrayList<>();
isRunning = true;
runnable = new LoadRunnable();
new Thread(runnable).start();
}
public void displayThumbnail(ImageView imageView, String videoPath, int resId) {
(videoPath);
Bitmap bitmap = loadImage(videoPath, getImageCallback(imageView, resId));
if (bitmap == null){
(resId);
}else {
(bitmap);
}
}
private Bitmap loadImage(String videoPath, ImageCallback callback) {
if (caches .containsKey(videoPath)){
SoftReference softReference = (videoPath);
Bitmap bitmap = ();
if (bitmap == null){
(videoPath);
}else {
return bitmap;
}
}else {
LoadTask task = new LoadTask();
= videoPath;
= callback;
if (!(task)){
(task);
synchronized (runnable) {
();
}
}
}
return null;
}
//回调接口
public interface ImageCallback{
void loadImage(String path, Bitmap bitmap);
}
class LoadTask{
String path;
Bitmap bitmap;
ImageCallback callback;
@Override
public boolean equals(Object o) {
LoadTask task = (LoadTask)o;
return (path);
}
}
private LoadRunnable runnable;
private boolean isRunning = false;
class LoadRunnable implements Runnable {
@Override
public void run() {
while (isRunning){
while (() > 0){
LoadTask task = (0);
= CustomUtil.getVideoThumbnail1();
(, new SoftReference());
if(handler != null){
Message msg = ();
= task;
(msg);
}
}
synchronized (this) {
try {
();
} catch (InterruptedException e) {
();
}
}
}
}
}
private ImageCallback getImageCallback(final ImageView imageView, final int resId){
return new ImageCallback() {
@Override
public void loadImage(String path, Bitmap bitmap) {
if((().toString())){
(bitmap);
}else{
(resId);
}
}
};
}
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
LoadTask task = (LoadTask);
(, );
}
};
}
然后在listview或者recycleview加载item：
().displayThumbnail(holder.iv_photo, sdState + (position - 1), .loading_img);
第一个参数的加载的view(ImageView)，第二个是文件的路径(URL)，第三个是默认加载的图片，也就是当没有获取到视频缩略图时默认显示的图片。