我要评论本文实例为大家分享了surfaceview视频弹幕展示的具体代码，供大家参考，具体内容如下
全部代码如下:
package com.example.app2;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.pixelformat;
import android.graphics.porterduff;
import android.media.mediaplayer;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.text.textutils;
import android.view.surfaceholder;
import android.view.surfaceview;
import android.view.view;
import android.widget.edittext;
import android.widget.toast;
import java.io.ioexception;
import java.util.arraylist;
import java.util.list;
public class mainactivity extends appcompatactivity implements surfaceholder.callback {
private surfaceview msvvideo;
private surfaceview msvdanmu;
private edittext med;
private mediaplayer mediaplayer;
private surfaceholder svvideoholder, svdanmuholder;
private boolean isplay = true;
list<danmubean> list = new arraylist<>();
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
// 创建mediaplayer
initplayer();
// 初始化视图
initview();
}
private void initplayer() {
if (mediaplayer == null) {
mediaplayer = new mediaplayer();
}
// 重置
mediaplayer.reset();
try {
mediaplayer.setdatasource("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4");
mediaplayer.prepareasync(); //异步准备
mediaplayer.setonpreparedlistener(new mediaplayer.onpreparedlistener() {
@override
public void onprepared(mediaplayer mp) {
mediaplayer.setlooping(true); //是否开启循环播放
mediaplayer.start(); //开始播放
}
});
} catch (ioexception e) {
e.printstacktrace();
}
}
/**
* 发送的信息
*
* @param view
*/
public void send(view view) {
submit();
}
private void submit() {
// validate 非空判断
string edstring = med.gettext().tostring().trim();
if (textutils.isempty(edstring)) {
toast.maketext(this, "edstring不能为空", toast.length_short).show();
return;
}
list.add(new danmubean(edstring)); //添加数据
med.settext(""); //清空
}
private void initview() {
msvvideo = (surfaceview) findviewbyid(r.id.sv_video);
msvdanmu = (surfaceview) findviewbyid(r.id.sv_danmu);
med = (edittext) findviewbyid(r.id.ed);
// 初始化 svdanmuholder svvideoholder
svvideoholder = msvvideo.getholder();
svdanmuholder = msvdanmu.getholder();
// 添加监听
svvideoholder.addcallback(this);
svdanmuholder.addcallback(this);
// 将弹幕显示在最上层, 并设置为透明
msvdanmu.setzorderontop(true);
svdanmuholder.setformat(pixelformat.transparent); //pixelformat: 像素格式, transparent(2):透明的; translucent(-3):半透明
}
/**
* surfacecreated:创建
*
* @param holder
*/
@override
public void surfacecreated(surfaceholder holder) {
if (holder == svvideoholder) {
mediaplayer.setdisplay(svvideoholder); //将内容显示在 svvideoholder上
} else if (holder == svdanmuholder) {
// 弹幕设置 开启线程
new thread(new runnable() {
@override
public void run() {
while (isplay) { //死循环
// 得到画笔, 设置属性
paint paint = new paint();
paint.setstrokewidth(5); //设置笔画宽度
paint.settextsize(30); //设置字体大小
paint.setcolor(color.green); // 设置颜色
// 得到画布 通过lockcanvas
canvas canvas = svdanmuholder.lockcanvas();
if (canvas == null) {
break;
}
// 填充画布的颜色
canvas.drawcolor(pixelformat.transparent, porterduff.mode.clear); //参数1: 设为透明, 参2: porterduff.mode.clear: 所绘制不会提交到画布上
// 设置弹幕内容
for (int i = 0; i < list.size(); i++) {
string text = list.get(i).text;
canvas.drawtext(text, list.get(i).x += 1, list.get(i).y, paint);
if (list.get(i).x > msvvideo.getwidth()) {
list.get(i).x = 0;
}
}
// 提交
svdanmuholder.unlockcanvasandpost(canvas);
}
}
}).start();
}
}
@override
public void surfacechanged(surfaceholder holder, int format, int width, int height) {
}
@override
public void surfacedestroyed(surfaceholder holder) {
isplay = false;
}
}
布局xml
<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".mainactivity">
<framelayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<surfaceview
android:id="@+id/sv_video"
android:layout_width="match_parent"
android:layout_height="280dp" />
<surfaceview
android:id="@+id/sv_danmu"
android:layout_width="match_parent"
android:layout_height="280dp" />
</framelayout>
<linearlayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<edittext
android:id="@+id/ed"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onclick="send"
android:text="弹幕" />
</linearlayout>
</linearlayout>
效果界面：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
您可能感兴趣的文章:
如您对本文有疑问或者有任何想说的，请点击进行留言回复，万千网友为您解惑！
网友评论