Java tutorial
/* * Copyright 2014 Soichiro Kashima * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.snippet.app; import com.snippet.R; import com.snippet.widget.AlertDialogFragment; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentTransaction; import android.view.View; public class DialogActivity extends FragmentActivity { private static final String DIALOG_TAG = "dialog"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_dialog); findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showAlertDialog("Title", "The quick brown fox jumps over the lazy dog."); } }); } private void showAlertDialog(final String title, final String message) { AlertDialogFragment dialogFragment = AlertDialogFragment.newInstance(); dialogFragment.setTitle(title); dialogFragment.setMessage(message); showDialogFragment(dialogFragment); } public void showDialogFragment(final DialogFragment dialogFragment) { FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); Fragment prev = getSupportFragmentManager().findFragmentByTag(DIALOG_TAG); if (prev != null) { ft.remove(prev); } // Don't add to back stack. Adding to back stack makes popping up // removed fragment when DialogFragment crushed with // IllegalStateException. // ft.addToBackStack(null); if (dialogFragment != null) { dialogFragment.show(ft, DIALOG_TAG); } } public void dismissDialogFragment() { FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); DialogFragment prev = (DialogFragment) getSupportFragmentManager().findFragmentByTag(DIALOG_TAG); if (prev != null) { try { prev.dismiss(); } catch (IllegalStateException e) { // Just ignore this exception e.printStackTrace(); } ft.remove(prev); ft.commitAllowingStateLoss(); } } }