Android(安卓)service里面启动activity和alertdialog

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

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

启动alertDialog源码:

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

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

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