Android service里面启动activity和alertdialog

启动activity源码:(记得要加上Intent.FLAG_ACTIVITY_NEW_TASK)

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1. Intent intent = new Intent();  
2. intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   
3. intent.setClass(getApplicationContext(),FileBrowserActivity.class);  
4. startActivity(intent);  

Intent intent = new Intent();intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setClass(getApplicationContext(),FileBrowserActivity.class);startActivity(intent);

启动alertDialog源码:

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1.         AlertDialog.Builder builder = new AlertDialog.Builder(this);  
2.         builder.setMessage("是否接受文件?")  
3.                 .setPositiveButton("是", new DialogInterface.OnClickListener() {  
4.                     @Override  
5.                     public void onClick(DialogInterface dialog, int which) {  
6.   
7.                     }  
8.                 }).setNegativeButton("否", new OnClickListener() {  
9.                     @Override  
10.                     public void onClick(DialogInterface dialog, int which) {  
11.                     }  
12.                 });  
13.         AlertDialog ad = builder.create();  
14. //      ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); //系统中关机对话框就是这个属性   
15.         ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);  
16.         ad.setCanceledOnTouchOutside(false);                                   //点击外面区域不会让dialog消失  
17.         ad.show();  

AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setMessage("是否接受文件?").setPositiveButton("是", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}}).setNegativeButton("否", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}});AlertDialog ad = builder.create();//ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); //系统中关机对话框就是这个属性 ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);ad.setCanceledOnTouchOutside(false);                                   //点击外面区域不会让dialog消失ad.show();

还要加上权限

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1. <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />