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.DialogInte易做图ce.OnClickListener() {
     @Override
     public void onClick(DialogInte易做图ce 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.DialogInte易做图ce.OnClickListener() {
     @Override
     public void onClick(DialogInte易做图ce 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 DialogInte易做图ce.OnClickListener() {

        @Override
        public void onClick(DialogInte易做图ce dialog,
          int which) {
         // TODO Auto-generated method stub

}
}).setNegativeButton("退出", new OnClickListener() {

      @Override
      public void onClick(DialogInte易做图ce 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();

摘自 gongzibai的专栏

补充：移动开发 , Android ,