SurfaceView播放視頻

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.example.examday11_4_1.surfaceview.MySurfaceView
        android:id="@+id/sv"
        android:layout_width="match_parent"
        android:layout_height="250dp" />

    <TextView
        android:id="@+id/te_nowTiem"
        android:textColor="#fff"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/sv"
        android:layout_marginLeft="60dp"
        android:layout_marginBottom="10dp"
        android:text="00:00" />

    <SeekBar
        android:id="@+id/sb"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/sv"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="10dp" />

    <TextView
        android:id="@+id/te_allTiem"
        android:textColor="#fff"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/sv"
        android:layout_marginLeft="320dp"
        android:layout_marginBottom="10dp"
        android:text="00:00" />

    <Button
        android:id="@+id/but_play"
        android:layout_width="50dp"
        android:layout_height="40dp"
        android:layout_alignBottom="@+id/sv"
        android:layout_marginLeft="10dp"
        android:text="S/P"
        android:textSize="10sp" />

</RelativeLayout>

mySurfaceView

package com.example.examday11_4_1.surfaceview;

import android.content.Context;
import android.media.MediaPlayer;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import java.io.IOException;
import java.text.SimpleDateFormat;

public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder surfaceHolder;
    private MediaPlayer mediaPlayer;

    public MySurfaceView(Context context) {
        super(context);
    }

    public MySurfaceView(Context context, AttributeSet attrs) {
        super(context, attrs);
        surfaceHolder = getHolder();
        surfaceHolder.addCallback(this);
        if (mediaPlayer == null){
            mediaPlayer = new MediaPlayer();
        }
    }

    public MySurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public MySurfaceView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    public void setDataPath(String path){
        mediaPlayer.reset();
        try {
            mediaPlayer.setDataSource(path);
            mediaPlayer.prepareAsync();
            mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                    mediaPlayer.start();
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        mediaPlayer.setDisplay(surfaceHolder);
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        if (mediaPlayer!=null){
            mediaPlayer.release();
            mediaPlayer = null;
        }
    }

    //暫停/開始播放
    public void playOrNo(){
        if (mediaPlayer!=null){
            if (mediaPlayer.isPlaying()){
                mediaPlayer.pause();
            }else {
                mediaPlayer.start();
            }
        }
    }

    //拖動更新進度
    public void seekTo(int progress){
        if (mediaPlayer!=null){
            int duration = mediaPlayer.getDuration();
            int current = progress * duration /100;
            mediaPlayer.seekTo(current);
        }
    }

    //獲取播放進度
    public int getProgress(){
        if (mediaPlayer!=null){
            int druation = mediaPlayer.getDuration();
            int currentPosition = mediaPlayer.getCurrentPosition();
            int progress = currentPosition * 100 / druation;
            return progress;
        }
        return 0;
    }

    //獲取播放時長
    public String getCurrentTime(){
        if (mediaPlayer!=null){
            long currentPostion = mediaPlayer.getCurrentPosition();
            SimpleDateFormat format = new SimpleDateFormat("mm:ss");
            String f = format.format(currentPostion);
            return f+"";

        }
        return "";
    }

    //獲取時長
    public  String getDuration(){
        if (mediaPlayer!=null){
            long duration = mediaPlayer.getDuration();
            SimpleDateFormat format = new SimpleDateFormat("mm:ss");
            return format.format(duration)+"";
        }
        return "";
    }

}

MainActivity

package com.example.examday11_4_1;

import android.Manifest;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.example.examday11_4_1.surfaceview.MySurfaceView;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {

    private MySurfaceView mySurfaceView;
    private TextView teNowTiem;
    private SeekBar sb;
    private TextView teAllTiem;
    private Button butPlay;
    private Timer timer;
    private Handler handler = new Handler();
    private String path ="http://uvideo.spriteapp.cn/video/2019/0512/56488d0a-7465-11e9-b91b-1866daeb0df1_wpd.mp4";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){
            requestPermissions(new String[]{
                    Manifest.permission.READ_EXTERNAL_STORAGE
            },100);
        }
        initView();
        initTimer();

    }

    private void initTimer() {
        timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                final String currentTime = mySurfaceView.getCurrentTime();
                final String duration = mySurfaceView.getDuration();
                final int progress = mySurfaceView.getProgress();
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        sb.setProgress(progress);//設置進度條
                        teAllTiem.setText(duration);//設置總時長
                        teNowTiem.setText(currentTime);//設置當前時長
                    }
                });
            }
        },0,100);
    }

    private void initView() {
        mySurfaceView = (MySurfaceView) findViewById(R.id.sv);
        mySurfaceView.setDataPath(path);
        teNowTiem = (TextView) findViewById(R.id.te_nowTiem);
        sb = (SeekBar) findViewById(R.id.sb);
        teAllTiem = (TextView) findViewById(R.id.te_allTiem);
        butPlay = (Button) findViewById(R.id.but_play);

        //設置拖動
        sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (fromUser){
                    mySurfaceView.seekTo(progress);//視頻播放拖動
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

        //暫停播放
        butPlay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mySurfaceView.playOrNo();
            }
        });

    }
}