Java tutorial
/* * Copyright (C) 2007 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 android.view; import com.android.frameworks.coretests.R; import android.os.Bundle; import android.widget.Button; import android.view.View; import android.app.Activity; /** * Exercise View's ability to change their visibility: GONE, INVISIBLE and * VISIBLE. */ public class Visibility extends Activity { @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.visibility); // Find the view whose visibility will change mVictim = findViewById(R.id.victim); // Find our buttons Button visibleButton = findViewById(R.id.vis); Button invisibleButton = findViewById(R.id.invis); Button goneButton = findViewById(R.id.gone); // Wire each button to a click listener visibleButton.setOnClickListener(mVisibleListener); invisibleButton.setOnClickListener(mInvisibleListener); goneButton.setOnClickListener(mGoneListener); } View.OnClickListener mVisibleListener = new View.OnClickListener() { public void onClick(View v) { mVictim.setVisibility(View.VISIBLE); } }; View.OnClickListener mInvisibleListener = new View.OnClickListener() { public void onClick(View v) { mVictim.setVisibility(View.INVISIBLE); } }; View.OnClickListener mGoneListener = new View.OnClickListener() { public void onClick(View v) { mVictim.setVisibility(View.GONE); } }; private View mVictim; }