[英]AlertDialog inside a frame layout in an app with bottom navigation bar
我做了一个带有底部导航栏的简单应用。 我希望栏上的按钮之一显示一个片段,当它使用setCancelable(false)
加载时,上面会显示一个alertdialog,但是我仍然可以在其他片段之间进行切换。 但是,当我在fragment类的onCreate()
中使用警报对话框时,播放应用程序并选择带有警报对话框的按钮,警报对话框将覆盖整个屏幕,而我无法使用底部导航栏中的其他按钮。 因此,基本上我想做的是仅在框架布局(容器)中显示警报对话框,而不在整个屏幕上显示警报对话框,以便当警报对话框仍在屏幕上时,我仍然可以使用导航栏上的其他按钮。 假设您有一个具有两个单独片段布局的应用程序。 我希望警报对话框仅以一种布局显示。
activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="abdul.com.myapp1.MainActivity">
<FrameLayout
android:id="@+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@android:color/holo_orange_dark">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:menu="@menu/navigation" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView bottomNavigationView = (BottomNavigationView)
findViewById(R.id.navigation);
bottomNavigationView.setOnNavigationItemSelectedListener
(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_home:
selectedFragment = second.newInstance();
break;
case R.id.navigation_dashboard:
selectedFragment = Third.newInstance();
break;
case R.id.navigation_notifications:
selectedFragment = Fourth.newInstance();
break;
case R.id.navigation_fifth:
selectedFragment = Fifth.newInstance();
break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
});
//Manually displaying the first fragment - one time only
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, second.newInstance());
transaction.commit();
//Used to select an item programmatically
//bottomNavigationView.getMenu().getItem(2).setChecked(true);
}
}
Third.java(这是我要使用alertdialog的地方)
public class Third extends Fragment {
public static Third newInstance() {
Third fragment = new Third();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
AlertDialog.Builder mBuilder = new AlertDialog.Builder(getActivity());
//LayoutInflater factory = LayoutInflater.from(v.getContext());
View mView2 = getActivity().getLayoutInflater().inflate(popup_onpressed, null);
mBuilder.setView(mView2);
final AlertDialog dialog = mBuilder.create();
dialog.show();
dialog.setCancelable(false);
dialog.setCanceledOnTouchOutside(false);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View mView = inflater.inflate(R.layout.third, container, false);
return mView;
}
}
我也尝试将其粘贴在onCreateView()中,但是它也没有起作用。
首先,您应该自定义alartdialog,然后可以使用此代码在屏幕的任何位置显示AlertDialog。
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