Demonstrates making a view VISIBLE, INVISIBLE and GONE : View « UI « Android

1. Android
2. UI
3. View

Demonstrates making a view VISIBLE, INVISIBLE and GONE

    
/*
 * 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 com.example.android.apis.view;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


/**
 * Demonstrates making a view VISIBLE, INVISIBLE and GONE
 *
 */
public class Visibility1 extends Activity {

    private View mVictim;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.visibility_1);

        // Find the view whose visibility will change
        mVictim = findViewById(R.id.victim);

        // Find our buttons
        Button visibleButton = (Button) findViewById(R.id.vis);
        Button invisibleButton = (Button) findViewById(R.id.invis);
        Button goneButton = (Button) findViewById(R.id.gone);

        // Wire each button to a click listener
        visibleButton.setOnClickListener(mVisibleListener);
        invisibleButton.setOnClickListener(mInvisibleListener);
        goneButton.setOnClickListener(mGoneListener);
    }

    OnClickListener mVisibleListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim.setVisibility(View.VISIBLE);
        }
    };

    OnClickListener mInvisibleListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim.setVisibility(View.INVISIBLE);
        }
    };

    OnClickListener mGoneListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim.setVisibility(View.GONE);
        }
    };
}
//layout/visibility_1.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 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.
-->

<!-- Demonstrates changing view visibility. See corresponding Java code. -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
      android:orientation="vertical"
      android:background="@drawable/box"
      android:layout_width="match_parent"
      android:layout_height="wrap_content">

      <TextView
          android:background="@drawable/red"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="@string/visibility_1_view_1"/>

      <TextView android:id="@+id/victim"
          android:background="@drawable/green"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="@string/visibility_1_view_2"/>

      <TextView
          android:background="@drawable/blue"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="@string/visibility_1_view_3"/>

    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <Button android:id="@+id/vis"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/visibility_1_vis"/>

        <Button android:id="@+id/invis"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/visibility_1_invis"/>

        <Button android:id="@+id/gone"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/visibility_1_gone"/>

    </LinearLayout>
</LinearLayout>

   
    
    
    
  

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