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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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.example.android.supportv4.app;
import com.example.android.supportv4.R;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
/**
* Demonstration of hiding and showing fragments.
*/
public class FragmentHideShowSupport extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_hide_show_support);
// The content view embeds two fragments; now retrieve them and attach
// their "hide" button.
FragmentManager fm = getSupportFragmentManager();
addShowHideListener(R.id.frag1hide, fm.findFragmentById(R.id.fragment1));
addShowHideListener(R.id.frag2hide, fm.findFragmentById(R.id.fragment2));
}
void addShowHideListener(int buttonId, final Fragment fragment) {
final Button button = (Button)findViewById(buttonId);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.anim.fade_in,
android.R.anim.fade_out);
if (fragment.isHidden()) {
ft.show(fragment);
button.setText("Hide");
} else {
ft.hide(fragment);
button.setText("Show");
}
ft.commit();
}
});
}
public static class FirstFragment extends Fragment {
TextView mTextView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.labeled_text_edit, container, false);
View tv = v.findViewById(R.id.msg);
((TextView)tv).setText("The fragment saves and restores this text.");
// Retrieve the text editor, and restore the last saved state if needed.
mTextView = (TextView)v.findViewById(R.id.saved);
if (savedInstanceState != null) {
mTextView.setText(savedInstanceState.getCharSequence("text"));
}
return v;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// Remember the current text, to restore if we later restart.
outState.putCharSequence("text", mTextView.getText());
}
}
public static class SecondFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.labeled_text_edit, container, false);
View tv = v.findViewById(R.id.msg);
((TextView)tv).setText("The TextView saves and restores this text.");
// Retrieve the text editor and tell it to save and restore its state.
// Note that you will often set this in the layout XML, but since
// we are sharing our layout with the other fragment we will customize
// it here.
((TextView)v.findViewById(R.id.saved)).setSaveEnabled(true);
return v;
}
}
}
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