标签：第十一天 void SurfaceView mp import new android public

SurfaceView与MediaPlayer搭配使用

• 实现音乐和歌词联动
• 视频联动
• 对应的第二个界面 专门负责播放

实现音乐和歌词联动

package com.example.mp_class;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.annotation.SuppressLint;
import android.content.pm.PackageManager;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;

import com.example.mp_class.bean.MySong;
import com.example.mp_class.bean.SongBean;
import com.google.gson.Gson;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

public class SongActivity extends AppCompatActivity implements SurfaceHolder.Callback{
    private static final String TAG = "123321";
    private SurfaceView surfaceView;
    private SurfaceHolder holder;
    private Timer time=new Timer();
    private MediaPlayer mp;
    private int index;

    private List<MySong> list=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_song);
//        readSong();
        surfaceView=findViewById(R.id.song_surface);
        holder=surfaceView.getHolder();
        holder.addCallback(this);
        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},111);


    }

//    @SuppressLint("SdCardPath")
    private void play_music() {
        mp=new MediaPlayer();
        try {
            mp.setDataSource("/sdcard/txt/凤凰传奇 - 最炫民族风(Live).mp3");
            mp.prepareAsync();
            mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mediaPlayer) {
//                    if( mp!=null) {
                        mp.start();
                        //开清定时器，判断时间，加坐标
                        time.schedule(new TimerTask() {
                            @Override
                            public void run() {
                                if( index+1<list.size()&&list.size()>0) {
                                    if (mp.getCurrentPosition() >= list.get(index+1).getTime()) {
                                        index++;
                                    }
                                }
                            }
                        },0,100);
                    }
//                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if( requestCode==111&&grantResults[0]== PackageManager.PERMISSION_GRANTED){
            readSong();

        }
    }

    private void readSong() {
        try {
//            FileInputStream fis = new FileInputStream(new File("/sdcard/txt/最炫民族风"));
            FileInputStream fis = new FileInputStream("/sdcard/txt/最炫民族风");
            byte[] bytes = new byte[1024];
            int len=0;
            StringBuffer sb = new StringBuffer();
            while( (len=fis.read(bytes))!=-1) {
                sb.append(new String(bytes,0,len));
            }
            Log.i(TAG, "readFile: 歌词"+sb.toString());
            Toast.makeText(this, ""+sb.toString(), Toast.LENGTH_SHORT).show();

            //开始切割
            String songs = sb.toString();
            SongBean songBean = new Gson().fromJson(songs, SongBean.class);
            String lyric = songBean.getLrc().getLyric();
            String[] split = lyric.split("\n");
            for (int i = 1; i < split.length; i++) {
                String split1 = split[i].replace("[", "#")
                        .replace("]", "#")
                        .replace(".","#")
                        .replaceFirst(":", "#");
                String[] split2 = split1.split("#");

                 Log.i(TAG, "readSong: split1"+ Arrays.toString(split2));
                int time=Integer.parseInt(split2[1])*60*1000+Integer.parseInt(split2[2])*1000+Integer.parseInt(split2[3]);
                Log.i(TAG, "readSong: 总毫秒数"+time);
                if( split2.length>=5) {
                    Log.i(TAG, "readSong: 歌词" + split2[4]);
                    MySong mySong = new MySong(split2[4], time);
                    list.add(mySong);
                    Log.i(TAG, "readSong: mysong"+mySong.toString());
                }

            }
            //播放
            play_music();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder surfaceHolder) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                Paint paint = new Paint();
                paint.setColor(Color.BLACK);
                paint.setTextSize(50);
//                if( list.size()>0)
                while( true) {
                    Canvas canvas = holder.lockCanvas();

                    canvas.drawColor(Color.WHITE);
                    if( list.size()>0) {
                        canvas.drawText(list.get(index).getText(), 100, 100, paint);
                    }

                    holder.unlockCanvasAndPost(canvas);
                }
            }
        }).start();
    }

    @Override
    public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {

    }
}

视频联动

package com.example.mp_class;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

import com.example.mp_class.adapter.MyAdapter;
import com.example.mp_class.bean.MyBean;
import com.example.mp_class.listener.MyListener;
import com.google.gson.Gson;
import com.lzy.okgo.OkGo;
import com.lzy.okgo.callback.StringCallback;
import com.lzy.okgo.model.Response;

import java.util.ArrayList;
import java.util.List;

public class Main2Activity extends AppCompatActivity {
    private RecyclerView rv;
    private List<MyBean.DataBean> list=new ArrayList<>();
    private MyAdapter aaa;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        init();
        get_data();
    }

    private void get_data() {
        OkGo.<String>get("https://www.apiopen.top/satinApi?type=1&page=2")
                .execute(new StringCallback() {
                    @Override
                    public void onSuccess(Response<String> response) {
                        MyBean myBean = new Gson().fromJson(response.body(), MyBean.class);
                        list.addAll(myBean.getData());
                        aaa.notifyDataSetChanged();
                    }

                    @Override
                    public void one rror(Response<String> response) {
                        super.onError(response);
                        Log.i("123321", "onError: "+response.message());
                    }
                });
    }

    private void init() {
        MyListener listener = new MyListener() {
            @Override
            public void click(int position) {
                Intent it = new Intent(Main2Activity.this, PlayActivity.class);
                it.putExtra("data",list.get(position).getVideouri());
                startActivity(it);
            }
        };

        rv=findViewById(R.id.main_recycler);
        rv.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
        aaa=new MyAdapter(this, this.list,listener);
        rv.setAdapter(aaa);


    }
}

对应的第二个界面 专门负责播放

package com.example.mp_class;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import java.io.IOException;

public class PlayActivity extends AppCompatActivity implements SurfaceHolder.Callback {
    private SurfaceView surfaceView;
    private MediaPlayer mp;
    private SurfaceHolder sh;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        mp=new MediaPlayer();
        surfaceView=findViewById(R.id.play_surface);
        sh=surfaceView.getHolder();
        sh.addCallback(this);

        Intent intent = getIntent();
        String data = intent.getStringExtra("data");
        mp.reset();
        try {
            mp.setDataSource(data);
            mp.prepareAsync();
            mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mediaPlayer) {
                    mp.start();
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


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

    @Override
    public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
        mp.release();
        mp=null;
    }
}

标签：第十一天,void,SurfaceView,mp,import,new,android,public
来源： https://blog.csdn.net/tounihouzi/article/details/100749631

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