开始我以为悬浮窗口,可以用Android中得PopupWindow 来实现,虽然也实现了,但局限性非常大。比如PopupWindow必须要有载体View,也就是说,必须要指定在那个View的上面来实现。以该View为相对位置,来显示PopupWindow。这就局限了其智能在用户交互的窗口上,相对的显示。而无法*的拖动位置和在桌面显示。
于是查阅了一些资料,有两种实现方法。一种是自定义Toast,Toast是运行于所有界面之上的,也就是说没有界面可以覆盖它。另一种是Android中得CompatModeWrapper类,ConmpatModeWrapper是基类,实现大部分功能的是它的内部类WindowManagerImpl。该对象可以通过getApplication().getSystemService(Context.WINDOW_SERVICE)得到。(注:如果是通过activity.getSystemService(Context.WINDOW_SERVICE)得到的只是属于Activity的LocalWindowManager)。
简单的介绍之后,我们直接来看代码实现,注释已经写在代码中。
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MainActivity.java
package com.example.floatviewdemo;
import com.example.floatviewdemo.service.FloatViewService;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onStart() {
Intent intent = new Intent(MainActivity. this , FloatViewService. class );
//启动FloatViewService
startService(intent);
super .onStart();
}
@Override
protected void onStop() {
// 销毁悬浮窗
Intent intent = new Intent(MainActivity. this , FloatViewService. class );
//终止FloatViewService
stopService(intent);
super .onStop();
}
}
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activity_main.xml
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<RelativeLayout 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:background= "#fff"
android:paddingBottom= "@dimen/activity_vertical_margin"
android:paddingLeft= "@dimen/activity_horizontal_margin"
android:paddingRight= "@dimen/activity_horizontal_margin"
android:paddingTop= "@dimen/activity_vertical_margin"
tools:context= "com.example.floatviewdemo.MainActivity" >
<TextView
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:text= "@string/hello_world" />
</RelativeLayout>
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实现悬浮窗功能的service类
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package com.example.floatviewdemo.service;
import com.example.floatviewdemo.R;
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.Toast;
public class FloatViewService extends Service
{
private static final String TAG = "FloatViewService" ;
//定义浮动窗口布局
private LinearLayout mFloatLayout;
private WindowManager.LayoutParams wmParams;
//创建浮动窗口设置布局参数的对象
private WindowManager mWindowManager;
private ImageButton mFloatView;
@Override
public void onCreate()
{
super .onCreate();
Log.i(TAG, "onCreate" );
createFloatView();
}
@SuppressWarnings ( "static-access" )
@SuppressLint ( "InflateParams" ) private void createFloatView()
{
wmParams = new WindowManager.LayoutParams();
//通过getApplication获取的是WindowManagerImpl.CompatModeWrapper
mWindowManager = (WindowManager)getApplication().getSystemService(getApplication().WINDOW_SERVICE);
//设置window type
wmParams.type = LayoutParams.TYPE_PHONE;
//设置图片格式,效果为背景透明
wmParams.format = PixelFormat.RGBA_8888;
//设置浮动窗口不可聚焦(实现操作除浮动窗口外的其他可见窗口的操作)
wmParams.flags = LayoutParams.FLAG_NOT_FOCUSABLE;
//调整悬浮窗显示的停靠位置为左侧置顶
wmParams.gravity = Gravity.LEFT | Gravity.TOP;
// 以屏幕左上角为原点,设置x、y初始值,相对于gravity
wmParams.x = 0 ;
wmParams.y = 152 ;
//设置悬浮窗口长宽数据
wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
LayoutInflater inflater = LayoutInflater.from(getApplication());
//获取浮动窗口视图所在布局
mFloatLayout = (LinearLayout) inflater.inflate(R.layout.alert_window_menu, null );
//添加mFloatLayout
mWindowManager.addView(mFloatLayout, wmParams);
//浮动窗口按钮
mFloatView = (ImageButton) mFloatLayout.findViewById(R.id.alert_window_imagebtn);
mFloatLayout.measure(View.MeasureSpec.makeMeasureSpec( 0 ,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec( 0 , View.MeasureSpec.UNSPECIFIED));
//设置监听浮动窗口的触摸移动
mFloatView.setOnTouchListener( new OnTouchListener()
{
boolean isClick;
@SuppressLint ( "ClickableViewAccessibility" ) @Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mFloatView.setBackgroundResource(R.drawable.circle_red);
isClick = false ;
break ;
case MotionEvent.ACTION_MOVE:
isClick = true ;
// getRawX是触摸位置相对于屏幕的坐标,getX是相对于按钮的坐标
wmParams.x = ( int ) event.getRawX()
- mFloatView.getMeasuredWidth() / 2 ;
// 减25为状态栏的高度
wmParams.y = ( int ) event.getRawY()
- mFloatView.getMeasuredHeight() / 2 - 75 ;
// 刷新
mWindowManager.updateViewLayout(mFloatLayout, wmParams);
return true ;
case MotionEvent.ACTION_UP:
mFloatView.setBackgroundResource(R.drawable.circle_cyan);
return isClick; // 此处返回false则属于移动事件,返回true则释放事件,可以出发点击否。
default :
break ;
}
return false ;
}
});
mFloatView.setOnClickListener( new OnClickListener()
{
@Override
public void onClick(View v)
{
Toast.makeText(FloatViewService. this , "一百块都不给我!" , Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onDestroy()
{
super .onDestroy();
if (mFloatLayout != null )
{
//移除悬浮窗口
mWindowManager.removeView(mFloatLayout);
}
}
@Override
public IBinder onBind(Intent intent) {
return null ;
}
}
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悬浮窗的xml文件
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alert_window_menu.xml
<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android"
android:layout_width= "wrap_content"
android:layout_height= "wrap_content"
android:orientation= "vertical" >
<ImageButton
android:id= "@+id/alert_window_imagebtn"
android:layout_width= "50dp"
android:layout_height= "50dp"
android:background= "@drawable/float_window_menu"
android:contentDescription= "@null"
/>
</LinearLayout>
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以上内容是实现Android 全界面悬浮按钮的全部叙述,希望大家喜欢。