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实际上,VideoView播放和可缩放之间没有任何必然联系。奈何由着我性子来(实际上是突然发现了可以这样试试)。依旧没有GIF图。依旧仅仅作为技术积累研究。
功能点:
横竖屏切换记录播放进度
跳转页面返回,或者切换后台再进来记录播放顺讯。
双指自由缩放视频播放大小。
原始大小:
缩放大小:
下面贴代码:
MainActivity.java
package com.example.qxb_810.videoplaydemo;
import android.Manifest;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.MediaController;
import android.widget.VideoView;
import butterknife.BindView;
import butterknife.ButterKnife;
public class MainActivity extends AppCompatActivity {
@BindView(R.id.vv_video)
VideoView vvVideo;
private int mCurrPostion = 0;
private double mCurrDistance = 0;
private double mlastDistance = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
requestPermissions();
if (savedInstanceState != null) {
// 横竖屏切换重新创建时获取播放进度
mCurrPostion = savedInstanceState.getInt("currPostion", 0);
}
initVideo();
initEvent();
}
/**
* 动态申请权限 ---- API23后需要动态申请权限
*/
private void requestPermissions() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
// 读写存储权限 和联网权限
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.INTERNET}, 1);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putInt("currPostion", vvVideo.getCurrentPosition());
super.onSaveInstanceState(outState);
}
private void initVideo() {
// 互联网路径 : http://****.***
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath() + "/bluetooth/pfzl.mp4");//将路径转换成uri
vvVideo.setMediaController(new MediaController(MainActivity.this));//显示控制进度条
vvVideo.setVideoURI(uri);//为视频播放器设置视频路径
vvVideo.seekTo(mCurrPostion);
vvVideo.start();
}
private void initEvent() {
vvVideo.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
mlastDistance = 0;
mCurrDistance = 0;
break;
case MotionEvent.ACTION_DOWN:
// 点击播放或暂停
if (vvVideo.isPlaying()) {
mCurrPostion = vvVideo.getCurrentPosition();
vvVideo.pause();
} else {
vvVideo.seekTo(mCurrPostion);
vvVideo.start();
}
}
// 实现缩放效果
if (event.getPointerCount() >= 2) {
float offsetX = event.getX(0) - event.getX(1);
float offsetY = event.getY(0) - event.getY(1);
mCurrDistance = Math.sqrt(offsetX * offsetX + offsetY * offsetY);
// 说明刚开始还未赋值
if (mlastDistance == 0) {
mlastDistance = mCurrDistance;
} else {
// 改变幅度大于5时
if (Math.abs(mCurrDistance - mlastDistance) > 5) {
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) vvVideo.getLayoutParams();
layoutParams.width = vvVideo.getWidth() + (int) (mCurrDistance - mlastDistance);
layoutParams.height = vvVideo.getHeight() + (int) (mCurrDistance - mlastDistance);
vvVideo.setLayoutParams(layoutParams);
mlastDistance = mCurrDistance;
}
}
}
return true;
}
});
}
@Override
protected void onStop() {
super.onStop();
if (vvVideo.isPlaying()) {
mCurrPostion = vvVideo.getCurrentPosition();
vvVideo.pause();
}
}
@Override
protected void onRestart() {
super.onRestart();
vvVideo.seekTo(mCurrPostion);
vvVideo.start();
}
}
对应布局文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<LinearLayout
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent">
<VideoView
android:id="@+id/vv_video"
android:layout_width="500dp"
android:layout_height="400dp"
android:layout_gravity="center" />
</LinearLayout>
</LinearLayout>