Android 模仿bilibili弹幕

来源：互联网发布：mac 最新系统编辑：程序博客网时间：2024/05/01 23:44

运行效果
这里写图片描述
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

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="demo.ligong.sdut.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:roundIcon="@mipmap/ic_launcher_round"        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>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    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" />    <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>

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