Android弹幕开发_Android如何模仿bilibili弹幕。运行效果:
MainActivity.java
package demo.ligong.sdut.danmutest; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.text.TextUtils; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.VideoView; import java.util.Random; import master.flame.danmaku.controller.DrawHandler; import master.flame.danmaku.danmaku.model.BaseDanmaku; import master.flame.danmaku.danmaku.model.DanmakuTimer; import master.flame.danmaku.danmaku.model.IDanmakus; import master.flame.danmaku.danmaku.model.android.DanmakuContext; import master.flame.danmaku.danmaku.model.android.Danmakus; import master.flame.danmaku.danmaku.parser.BaseDanmakuParser; import master.flame.danmaku.ui.widget.DanmakuView; public class MainActivity extends AppCompatActivity { private boolean showDanmaku; private DanmakuView danmakuView; private DanmakuContext danmakuContext; //创建一个弹幕的解析器才行,这里直接创建了一个全局的BaseDanmakuParser。 private BaseDanmakuParser parser = new BaseDanmakuParser() { @Override protected IDanmakus parse() { return new Danmakus(); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //获取VideoView的实例 VideoView videoView = (VideoView) findViewById(R.id.video_view); //设置视频文件的地址 videoView.setVideoPath(Environment.getDataDirectory() + "/Pixels.mp4"); videoView.start(); //我们先是获取到了DanmakuView控件的实例 danmakuView = (DanmakuView) findViewById(R.id.danmaku_view); //然后调用了enableDanmakuDrawingCache()方法来提升绘制效率 danmakuView.enableDanmakuDrawingCache(true); //又调用了setCallback()方法来设置回调函数。 danmakuView.setCallback(new DrawHandler.Callback() { @Override public void prepared() { showDanmaku = true; danmakuView.start(); generateSomeDanmaku(); } @Override public void updateTimer(DanmakuTimer timer) { } @Override public void danmakuShown(BaseDanmaku danmaku) { } @Override public void drawingFinished() { } }); //调用DanmakuContext.create()方法创建了一个DanmakuContext的实例 danmakuContext = danmakuContext.create(); danmakuView.prepare(parser,danmakuContext); final LinearLayout operationLayout = (LinearLayout) findViewById(R.id.operation_layout); final Button send = (Button) findViewById(R.id.send); final EditText editText = (EditText) findViewById(R.id.edit_text); danmakuView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(operationLayout.getVisibility() == View.GONE){ operationLayout.setVisibility(View.VISIBLE); }else { operationLayout.setVisibility(View.GONE); } } }); send.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String content = editText.getText().toString(); if (!TextUtils.isEmpty(content)){ addDanmaku(content,true); editText.setText(""); } } }); getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() { @Override public void onSystemUiVisibilityChange(int visibility) { if (visibility == View.SYSTEM_UI_FLAG_VISIBLE){ onWindowFocusChanged(true); } } }); } //随机生成一些弹幕消息 private void generateSomeDanmaku(){ new Thread(new Runnable() { @Override public void run() { while (showDanmaku){ int time = new Random().nextInt(300); String content = ""+time+time; addDanmaku(content,false); try { Thread.sleep(time); } catch (InterruptedException e) { e.printStackTrace(); } } } }).start(); } /** * 向弹幕View中添加一条弹幕 * @param content * 弹幕的具体内容 * @param withBorder * DanmakuContext可以用于对弹幕的各种全局配置进行设定,如设置字体、设置最大显示行数等 */ private void addDanmaku(String content,boolean withBorder){ BaseDanmaku danmaku = danmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL); danmaku.text = content; danmaku.padding = 5; danmaku.textSize = sp2px(20); danmaku.textColor= Color.WHITE; danmaku.setTime(danmakuView.getCurrentTime()); if(withBorder){ danmaku.borderColor = Color.GREEN; } danmakuView.addDanmaku(danmaku); } private int sp2px(float spValue) { final float fontScale = getResources().getDisplayMetrics().scaledDensity; return (int)(spValue * fontScale + 0.5f); } @Override protected void onPause() { super.onPause(); if(danmakuView != null && danmakuView.isPrepared()){ danmakuView.pause(); } } @Override protected void onResume() { super.onResume(); if(danmakuView != null && danmakuView.isPrepared() && danmakuView.isPaused()){ danmakuView.resume(); } } @Override protected void onDestroy() { super.onDestroy(); showDanmaku = false; if(danmakuView != null){ danmakuView.release(); danmakuView = null; } } @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); if (hasFocus && Build.VERSION.SDK_INT >= 19) { View decorView = getWindow().getDecorView(); decorView.setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY ); } } }
manifest.xml
activity_main.xml