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();