Android开发使用MediaPlayer播放视频

一、布局文件

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".VideoActivity">
    <TextureView
        android:id="@+id/textureViewVideo"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <Button
        android:id="@+id/btnStartPlay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

二、Activity源码

package com.example.learning01;

import androidx.appcompat.app.AppCompatActivity;

import android.hardware.Camera;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Surface;
import android.view.TextureView;
import android.view.View;
import android.widget.Button;

import java.io.File;
import java.io.IOException;

public class VideoActivity extends AppCompatActivity implements View.OnClickListener, MediaPlayer.OnPreparedListener, MediaPlayer.OnCompletionListener {
    private TextureView textureView;
    private Button btn;
    MediaPlayer mediaPlayer;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video);

        textureView= findViewById(R.id.textureViewVideo);
        btn = findViewById(R.id.btnStartPlay);


        btn.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        CharSequence text = btn.getText();
        if(TextUtils.equals(text,"开始")){
            btn.setText("结束");

            mediaPlayer = new MediaPlayer();
            mediaPlayer.setOnPreparedListener(this);
            mediaPlayer.setOnCompletionListener(this);
            try {
                mediaPlayer.setDataSource(new File(getExternalFilesDir(""),"video.mp4").getAbsolutePath());
            } catch (IOException e) {
                e.printStackTrace();
            }

            mediaPlayer.setSurface(new Surface(textureView.getSurfaceTexture()));

            mediaPlayer.prepareAsync();
        }

        else {
            btn.setText("开始");
            mediaPlayer.stop();
            mediaPlayer.release();

        }
    }

    @Override
    public void onPrepared(MediaPlayer mediaPlayer) {
        mediaPlayer.start();
    }

    @Override
    public void onCompletion(MediaPlayer mediaPlayer) {//视频部分完成
        btn.setText("开始");
        mediaPlayer.stop();
        mediaPlayer.release();
    }
}

三、注意点

视频播放完记得释放资源哦

public void onCompletion(MediaPlayer mediaPlayer) {//视频部分完成
        btn.setText("开始");
        mediaPlayer.stop();
        mediaPlayer.release();
    }