<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#000">
  <VideoView
    android:id="@+id/video_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"/>
</RelativeLayout>

public class MainActivity extends AppCompatActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    VideoView videoView = (VideoView) findViewById(R.id.video_view);
    videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/Pixels.mp4");
    videoView.start();
  }
  @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);
    }
  }
}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.guolin.danmutest">
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity" android:screenOrientation="landscape"
         android:configChanges="orientation|keyboardHidden|screenLayout|screenSize">
      <intent-filter>
        <action android:name="android.intent.action.MAIN"/>
        <category android:name="android.intent.category.LAUNCHER"/>
      </intent-filter>
    </activity>
  </application>
</manifest>

dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile 'com.android.support:appcompat-v7:24.2.1'
  testCompile 'junit:junit:4.12'
  compile 'com.github.ctiao:DanmakuFlameMaster:0.5.3'
}

<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#000">
  <VideoView
    android:id="@+id/video_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"/>
  <master.flame.danmaku.ui.widget.DanmakuView
    android:id="@+id/danmaku_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />
</RelativeLayout>

public class MainActivity extends AppCompatActivity {
  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);
    VideoView videoView = (VideoView) findViewById(R.id.video_view);
    videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/Pixels.mp4");
    videoView.start();
    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);
  }
  /**
   * 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;
    }
  }
  ......
}

<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#000">
  ......
  <LinearLayout
    android:id="@+id/operation_layout"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_alignParentBottom="true"
    android:background="#fff"
    android:visibility="gone">
    <EditText
      android:id="@+id/edit_text"
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="1"
      />
    <Button
      android:id="@+id/send"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:text="Send" />
  </LinearLayout>
</RelativeLayout>

public class MainActivity extends AppCompatActivity {
  ......
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ......
    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);
        }
      }
    });
  }
  ......
}