在service和BroadCastReceiver中启动activity和alertdialog

港控/mmm° 2022-05-14 03:53 190阅读 0赞

引用：[http://3387980.blog.51cto.com/3377980/982784][http_3387980.blog.51cto.com_3377980_982784]

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() {  
                            @Override 
                            public void onClick(DialogInterface dialog, int which) {  
         
                            }  
                        }).setNegativeButton("否", new OnClickListener() {  
                            @Override 
                            public 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" />

[http_3387980.blog.51cto.com_3377980_982784]: http://3387980.blog.51cto.com/3377980/982784