1、音樂播放功能

關鍵代碼：

MainActivity.java：

package thonlon.example.cn.musicdemowithoutservice;

import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
 

import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.IOException;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btn_play, btn_pause, btn_stop;
    private MediaPlayer mediaPlayer = new MediaPlayer();//實例化MediaPlayer類
 


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iniview();
        initMediaPlayer();
    }

    private void iniview() {
        btn_play = (Button) findViewById(R.id.btn_play);
        btn_pause = (Button) findViewById(R.id.btn_pause);
 

        btn_stop = (Button) findViewById(R.id.btn_stop);
        btn_play.setOnClickListener(this);
        btn_pause.setOnClickListener(this);
        btn_stop.setOnClickListener(this);
    }


    private void initMediaPlayer() {
        Uri uri = Uri.parse("http://www.nxl123.cn/snh.mp3");//網絡中的音樂文件
        try {
            mediaPlayer.setDataSource(this, uri);//音樂文件路徑
            mediaPlayer.prepare();//資源文件準備
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    initMediaPlayer();
                } else {
                    Toast.makeText(this, "拒絕權限無法繼續使用程序", Toast.LENGTH_SHORT).show();
                    finish();
                }
                break;
            default:
                break;
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_play:
                if (!mediaPlayer.isPlaying()) {
                    mediaPlayer.start();//播放
                }
                break;
            case R.id.btn_pause:
                if (mediaPlayer.isPlaying()) {
                    mediaPlayer.pause();//暫停
                }
                break;
            case R.id.btn_stop:
                if (mediaPlayer.isPlaying()) {
                    mediaPlayer.reset();//停止
                }
                break;
            default:
                break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mediaPlayer != null) {
            mediaPlayer.stop();
            mediaPlayer.release();
        }
    }
}

2、視頻播放功能（VideoView實現）

MainActivity.java：

package thonlon.example.cn.videoplaydemowithoutservice;

import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btn_play, btn_pause, btn_replay;
    private VideoView videoView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        btn_play = (Button) findViewById(R.id.btn_play);
        btn_pause = (Button) findViewById(R.id.btn_pause);
        btn_replay = (Button) findViewById(R.id.btn_replay);
        videoView = (VideoView) findViewById(R.id.vv_show);
        btn_play.setOnClickListener(this);
        btn_pause.setOnClickListener(this);
        btn_replay.setOnClickListener(this);
        initVideoPath();
    }

    private void initVideoPath() {
        //播放本地資源文件
        videoView.setVideoURI(Uri.parse("android.resource://thonlon.example.cn.videoplaydemowithoutservice/"+R.raw.demo));//設置資源路徑
//        videoView.setMediaController(new MediaController(this));//播放時點擊videoView顯示控制條
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_play:
                if (!videoView.isPlaying()) {
                    videoView.start();//開始播放
                }
                break;
            case R.id.btn_pause:
                if (videoView.isPlaying()) {
                    videoView.pause();//暫停播放
                }
                break;
            case R.id.btn_replay:
                if (videoView.isPlaying()) {
                    videoView.resume();//重新播放
                }
                break;
            default:
                break;
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    initVideoPath();
                } else {
                    Toast.makeText(this, "無法播放", Toast.LENGTH_SHORT).show();
                    finish();
                }
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (videoView != null){
            videoView.suspend();
        }
    }
}

安卓音、視頻播放功能簡單實現 --Android基礎