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android 懸浮窗口的拖動
package net.xsmile.fv;
import android.app.Application;
import android.view.WindowManager;
public class MyApplication extends Application {
/**
* 創建全局變量
* 全局變量一般都比較傾向於創建一個單獨的數據類文件，並使用static靜態變量
*
* 這裏使用了在Application中添加數據的方法實現全局變量
* 注意在AndroidManifest.xml中的Application節點添加android:name=".MyApplication"屬性
*
*/
private WindowManager.LayoutParams wmParams=new WindowManager.LayoutParams();
public WindowManager.LayoutParams getMywmParams(){
return wmParams;
}
}
package net.xsmile.fv;
import android.content.Context;
import android.util.Log;
import android.view.MotionEvent;
import android.view.WindowManager;
import android.widget.ImageView;
public class MyFloatView extends ImageView {
private float mTouchStartX;
private float mTouchStartY;
private float x;
private float y;
private WindowManager wm=(WindowManager)getContext().getApplicationContext().getSystemService("window");
//此wmParams為獲取的全局變量，用以保存懸浮窗口的屬性
private WindowManager.LayoutParams wmParams = ((MyApplication)getContext().getApplicationContext()).getMywmParams();
public MyFloatView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@Override
public boolean onTouchEvent(MotionEvent event) {
//獲取相對屏幕的坐標，即以屏幕左上角為原點
x = event.getRawX();
y = event.getRawY()-25; //25是係統狀態欄的高度
Log.i("currP", "currX"+x+"====currY"+y);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
//獲取相對View的坐標，即以此View左上角為原點
mTouchStartX = event.getX();
mTouchStartY = event.getY();
Log.i("startP", "startX"+mTouchStartX+"====startY"+mTouchStartY);
break;
case MotionEvent.ACTION_MOVE:
updateViewPosition();
break;
case MotionEvent.ACTION_UP:
updateViewPosition();
mTouchStartX=mTouchStartY=0;
break;
}
return true;
}
private void updateViewPosition(){
//更新浮動窗口位置參數
wmParams.x=(int)( x-mTouchStartX);
wmParams.y=(int) (y-mTouchStartY);
wm.updateViewLayout(this, wmParams);
}
}
package net.xsmile.fv;
import android.app.Activity;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
public class MyFloatViewActivity extends Activity {
/** Called when the activity is first created. */
private WindowManager wm=null;
private WindowManager.LayoutParams wmParams=null;
private MyFloatView myFV=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//創建懸浮窗口
createView();
}
private void createView(){
myFV=new MyFloatView(getApplicationContext());
myFV.setImageResource(R.drawable.icon);
//獲取WindowManager
wm=(WindowManager)getApplicationContext().getSystemService("window");
//設置LayoutParams(全局變量）相關參數
wmParams = ((MyApplication)getApplication()).getMywmParams();
/**
*以下都是WindowManager.LayoutParams的相關屬性
* 具體用途可參考SDK文檔
*/
wmParams.type=LayoutParams.TYPE_PHONE; //設置window type
wmParams.format=PixelFormat.RGBA_8888; //設置圖片格式，效果為背景透明
//設置Window flag
wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL
| LayoutParams.FLAG_NOT_FOCUSABLE;
/*
* 下麵的flags屬性的效果形同“鎖定”。
* 懸浮窗不可觸摸，不接受任何事件,同時不影響後麵的事件響應。
wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL
| LayoutParams.FLAG_NOT_FOCUSABLE
| LayoutParams.FLAG_NOT_TOUCHABLE;
*/
wmParams.gravity=Gravity.LEFT|Gravity.TOP; //調整懸浮窗口至左上角
//以屏幕左上角為原點，設置x、y初始值
wmParams.x=0;
wmParams.y=0;
//設置懸浮窗口長寬數據
wmParams.width=40;
wmParams.height=40;
//顯示myFloatView圖像
wm.addView(myFV, wmParams);
}
@Override
public void onDestroy(){
super.onDestroy();
//在程序退出(Activity銷毀）時銷毀懸浮窗口
wm.removeView(myFV);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:andro
package="net.xsmile.fv"
android:versionCode="1"
android:versionName="1.0">
<application android:name=".MyApplication" android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MyFloatViewActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
</manifest>
最後更新：2017-04-02 15:15:31