Android端弹幕效果实现

package com.example.guolin.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.view.inputmethod.InputMethodManager; 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 static final String TAG = "MainActivity"; private boolean showDanmaku; private DanmakuView danmakuView; private DanmakuContext danmakuContext; 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); final VideoView videoView = (VideoView) findViewById(R.id.video_view); videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/Pixels.mp4"); videoView.seekTo(2530000); videoView.start(); new android.os.Handler().postDelayed(new Runnable() { @Override public void run() { videoView.pause(); } }, 0); danmakuView = (DanmakuView) findViewById(R.id.danmaku_view); danmakuView.enableDanmakuDrawingCache(true); 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() { } }); 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 view) { if (operationLayout.getVisibility() == View.GONE) { operationLayout.setVisibility(View.VISIBLE); } else { operationLayout.setVisibility(View.GONE); } } }); send.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { 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); } } }); } /** * 向弹幕View中添加一条弹幕 * @param content * 弹幕的具体内容 * @param withBorder * 弹幕是否有边框 */ 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); } /** * 随机生成一些弹幕内容以供测试 */ 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(); } /** * sp转px的方法。 */ public 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_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); } } }