标签:layout tor screen tin 绿色 mis 意图 sleep fonts
现在网络直播越来越火,网络主播也逐渐成为一种新兴职业,对于网络直播,弹幕功能是必须要有的,如下图:
首先来分析一下,这个弹幕功能是怎么实现的,首先在最下面肯定是一个游戏界面View,然后游戏界面上有弹幕View,弹幕的View必须要做成完全透明的,这样即使覆盖在游戏界面的上方也不会影响到游戏的正常观看,只有当有人发弹幕消息时,再将消息绘制到弹幕的View上面就可以了,下方肯定还有有操作界面View,可以让用户来发弹幕和送礼物的功能,原理示意图如下所示:
参照原理图,下面一步一步来实现这个功能。
实现视频的播放
activity_main.xml
<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>MainActivity.java
package com.jackie.bombscreen; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.VideoView; 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() + "/xiaoxingyun.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); } } }最后别忘了设置AndroidMainfest.xml
效果如下:
、
实现弹幕的效果
接下来我们开始实现弹幕效果。弹幕其实也就是一个自定义的View,它的上面可以显示类似于跑马灯的文字效果。观众们发表的评论都会在弹幕上显示出来,但又会很快地移出屏幕,既可以起到互动的作用,同时又不会影响视频的正常观看。
我们可以自己来编写这样的一个自定义View,当然也可以直接使用网上现成的开源项目。那么为了能够简单快速地实现弹幕效果,这里我就准备直接使用由哔哩哔哩开源的弹幕效果库DanmakuFlameMaster。
DanmakuFlameMaster库的项目主页地址是:https://github.com/Bilibili/DanmakuFlameMaster
添加build.gradle依赖
compile ‘com.github.ctiao:DanmakuFlameMaster:0.5.3‘
<?xml version="1.0" encoding="utf-8"?> <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>修改MainActivity.java
package com.jackie.bombscreen; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.view.View; 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 mIsShowDanmaku; private DanmakuView mDanmakuView; private DanmakuContext mDanmakuContext; 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() + "/xiaoxingyun.mp4"); videoView.start(); mDanmakuView = (DanmakuView) findViewById(R.id.danmaku_view); mDanmakuView.enableDanmakuDrawingCache(true); mDanmakuView.setCallback(new DrawHandler.Callback() { @Override public void prepared() { mIsShowDanmaku = true; mDanmakuView.start(); generateSomeDanmaku(); } @Override public void updateTimer(DanmakuTimer timer) { } @Override public void danmakuShown(BaseDanmaku danmaku) { } @Override public void drawingFinished() { } }); mDanmakuContext = DanmakuContext.create(); mDanmakuView.prepare(parser, mDanmakuContext); } /** * 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 = mDanmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL); danmaku.text = content; danmaku.padding = 5; danmaku.textSize = sp2px(20); danmaku.textColor = Color.WHITE; danmaku.setTime(mDanmakuView.getCurrentTime()); if (withBorder) { danmaku.borderColor = Color.GREEN; } mDanmakuView.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(mIsShowDanmaku) { 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 (mDanmakuView != null && mDanmakuView.isPrepared()) { mDanmakuView.pause(); } } @Override protected void onResume() { super.onResume(); if (mDanmakuView != null && mDanmakuView.isPrepared() && mDanmakuView.isPaused()) { mDanmakuView.resume(); } } @Override protected void onDestroy() { super.onDestroy(); mIsShowDanmaku = false; if (mDanmakuView != null) { mDanmakuView.release(); mDanmakuView = 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); } } }效果图如下:
加入操作界面
<?xml version="1.0" encoding="utf-8"?> <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" /> <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>
package com.jackie.bombscreen; 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 mIsShowDanmaku; private DanmakuView mDanmakuView; private DanmakuContext mDanmakuContext; 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() + "/xiaoxingyun.mp4"); videoView.start(); mDanmakuView = (DanmakuView) findViewById(R.id.danmaku_view); mDanmakuView.enableDanmakuDrawingCache(true); mDanmakuView.setCallback(new DrawHandler.Callback() { @Override public void prepared() { mIsShowDanmaku = true; mDanmakuView.start(); generateSomeDanmaku(); } @Override public void updateTimer(DanmakuTimer timer) { } @Override public void danmakuShown(BaseDanmaku danmaku) { } @Override public void drawingFinished() { } }); mDanmakuContext = DanmakuContext.create(); mDanmakuView.prepare(parser, mDanmakuContext); 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); mDanmakuView.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 = mDanmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL); danmaku.text = content; danmaku.padding = 5; danmaku.textSize = sp2px(20); danmaku.textColor = Color.WHITE; danmaku.setTime(mDanmakuView.getCurrentTime()); if (withBorder) { danmaku.borderColor = Color.GREEN; } mDanmakuView.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(mIsShowDanmaku) { 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 (mDanmakuView != null && mDanmakuView.isPrepared()) { mDanmakuView.pause(); } } @Override protected void onResume() { super.onResume(); if (mDanmakuView != null && mDanmakuView.isPrepared() && mDanmakuView.isPaused()) { mDanmakuView.resume(); } } @Override protected void onDestroy() { super.onDestroy(); mIsShowDanmaku = false; if (mDanmakuView != null) { mDanmakuView.release(); mDanmakuView = 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); } } }效果图如下:
自己发的弹幕有绿色边框,很容易区分。
基本上实现了弹幕的功能,当然,里面的知识点还有很多,这只是最基本的功能。有时间的话,建议学学DanmakuFlameMaster,里面还有很多炫酷的功能。
标签:layout tor screen tin 绿色 mis 意图 sleep fonts
原文地址:http://blog.csdn.net/shineflowers/article/details/53054359