想要添加带有drawerlayout的弹出屏幕

Question

我想在drawerlayout中添加一个弹出屏幕。在退出之前，屏幕将给出是或否选项。现在我有了这段代码。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

Answer 1

你去;在你的活动有抽屉这样做：

@Override
public void onBackPressed() {
    //super.onBackPressed();
//i have commented out the super so that app wont destroy immediately
    askBeforeExit();
}

private void askBeforeExit() {

    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
    String title = "Confirm Exit";
    String message = "Are u sure u want to exit";

    dialogBuilder.setTitle(title);
    dialogBuilder.setMessage(message);
    dialogBuilder.setNegativeButton("Nope", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {

            dialog.dismiss();
        }
    });
    dialogBuilder.setPositiveButton("Yeah sure", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {

            //if okay exit the app
            dialog.dismiss();
            finish();
        }
    });

    dialogBuilder.create();
    dialogBuilder.show();
}