13518219792
这篇文章主要为大家展示了“如何使用SurfaceView实现视频弹幕”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“如何使用SurfaceView实现视频弹幕”这篇文章吧。
站在用户的角度思考问题，与客户深入沟通，找到巴林左旗网站设计与巴林左旗网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：成都网站制作、成都网站设计、企业官网、英文网站、手机端网站、网站推广、域名与空间、虚拟空间、企业邮箱。业务覆盖巴林左旗地区。
全部代码如下:
package com.example.app2;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PixelFormat;import android.graphics.PorterDuff;import android.media.MediaPlayer;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.TextUtils;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback { private SurfaceView mSvVideo; private SurfaceView mSvDanMu; private EditText mEd; private MediaPlayer mediaPlayer; private SurfaceHolder svVideoHolder, svDanMuHolder; private boolean isPlay = true; List list = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 创建MediaPlayer initPlayer(); // 初始化视图 initView(); } private void initPlayer() { if (mediaPlayer == null) { mediaPlayer = new MediaPlayer(); } // 重置 mediaPlayer.reset(); try { mediaPlayer.setDataSource("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"); mediaPlayer.prepareAsync(); //异步准备 mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mediaPlayer.setLooping(true); //是否开启循环播放 mediaPlayer.start(); //开始播放 } }); } catch (IOException e) { e.printStackTrace(); } } /** * 发送的信息 * * @param view */ public void send(View view) { submit(); } private void submit() { // validate 非空判断 String edString = mEd.getText().toString().trim(); if (TextUtils.isEmpty(edString)) { Toast.makeText(this, "edString不能为空", Toast.LENGTH_SHORT).show(); return; } list.add(new DanMuBean(edString)); //添加数据 mEd.setText(""); //清空 } private void initView() { mSvVideo = (SurfaceView) findViewById(R.id.sv_video); mSvDanMu = (SurfaceView) findViewById(R.id.sv_danMu); mEd = (EditText) findViewById(R.id.ed); // 初始化 svDanMuHolder svVideoHolder svVideoHolder = mSvVideo.getHolder(); svDanMuHolder = mSvDanMu.getHolder(); // 添加监听 svVideoHolder.addCallback(this); svDanMuHolder.addCallback(this); // 将弹幕显示在最上层, 并设置为透明 mSvDanMu.setZOrderOnTop(true); svDanMuHolder.setFormat(PixelFormat.TRANSPARENT); //PixelFormat: 像素格式, TRANSPARENT(2):透明的; TRANSLUCENT(-3):半透明 } /** * surfaceCreated:创建 * * @param holder */ @Override public void surfaceCreated(SurfaceHolder holder) { if (holder == svVideoHolder) { mediaPlayer.setDisplay(svVideoHolder); //将内容显示在 svVideoHolder上 } else if (holder == svDanMuHolder) { // 弹幕设置 开启线程 new Thread(new Runnable() { @Override public void run() { while (isPlay) { //死循环 // 得到画笔, 设置属性 Paint paint = new Paint(); paint.setStrokeWidth(5); //设置笔画宽度 paint.setTextSize(30); //设置字体大小 paint.setColor(Color.GREEN); // 设置颜色 // 得到画布 通过lockCanvas Canvas canvas = svDanMuHolder.lockCanvas(); if (canvas == null) { break; } // 填充画布的颜色 canvas.drawColor(PixelFormat.TRANSPARENT, PorterDuff.Mode.CLEAR); //参数1: 设为透明, 参2: PorterDuff.Mode.CLEAR: 所绘制不会提交到画布上 // 设置弹幕内容 for (int i = 0; i < list.size(); i++) { String text = list.get(i).text; canvas.drawText(text, list.get(i).x += 1, list.get(i).y, paint); if (list.get(i).x > mSvVideo.getWidth()) { list.get(i).x = 0; } } // 提交 svDanMuHolder.unlockCanvasAndPost(canvas); } } }).start(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { isPlay = false; }} 布局xml
