Android程序真退出与假退出后台运行详解

Android程序真退出与假退出后台运行详解

public void onBackPressed() { 
  AlertDialog.Builder builder = new Builder(LawdaquanActivity.this); 
  builder.setIcon(R.drawable.imagebutton5); 
  builder.setTitle("提示"); 
  builder.setMessage("你真的要退出法律信息软件吗？"); 
  builder.setPositiveButton("是", 
    new Android.content.DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      Intent i = new Intent(Intent.ACTION_MAIN);      i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      i.addCategory(Intent.CATEGORY_HOME);
      startActivity(i);
     } 
    }); 
  builder.setNegativeButton("否", 
    new android.content.DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      dialog.dismiss(); 
     } 
    }); 
  builder.create().show(); }
  
-------------真退出 
退出应用程序的实现:可以自己写个方法,例如:public void exitProgrames{
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 startActivity(startMain);
 android.os.Process.killProcess(android.os.Process.myPid());
  
 
 --------------重写ONKEYDOWN 
 public boolean onKeyDown(int keyCode, KeyEvent event) {   if (keyCode == KeyEvent.KEYCODE_BACK) { 
   new AlertDialog.Builder(this) 
     .setIcon(R.drawable.title) 
     .setTitle("退出软件") 
     .setMessage("是否退出法律文书软件") 
     .setPositiveButton("否", 
       new DialogInterface.OnClickListener() {        @Override 
        public void onClick(DialogInterface dialog, 
          int which) { 
         // TODO Auto-generated method stub        } 
       }).setNegativeButton("退出", new OnClickListener() {      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       // TODO Auto-generated method stub 
       finish(); 
      } 
     }).create().show(); 
  }  else { 
   return super.onKeyDown(keyCode, event);  }
  // TODO Auto-generated method stub 
  return super.onKeyDown(keyCode, event); 
 } 
-----------假退出 
Intent i = new Intent(Intent.ACTION_MAIN);      i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      i.addCategory(Intent.CATEGORY_HOME);
      startActivity(i); 
finish();