Android example source code file (DrawableBgMinSize.java)

This example Android source code file (DrawableBgMinSize.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

absolutelayout, activity, android, app, button, drawable, drawablebgminsize, framelayout, linearlayout, onclicklistener, os, override, relativelayout, textview, ui, view, widget

The DrawableBgMinSize.java Android example source code

/*
 * 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.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AbsoluteLayout;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

/**
 * Views should obey their background {@link Drawable}'s minimum size
 * requirements ({@link Drawable#getMinimumHeight()} and
 * {@link Drawable#getMinimumWidth()}) when possible.
 * <p>
 * This Activity exercises a few Views with background {@link Drawable}s. 
 */
public class DrawableBgMinSize extends Activity implements OnClickListener {
    private boolean mUsingBigBg = false;
    private Drawable mBackgroundDrawable;
    private Drawable mBigBackgroundDrawable;
    private Button mChangeBackgroundsButton;
    
    private TextView mTextView;
    private LinearLayout mLinearLayout;
    private RelativeLayout mRelativeLayout;
    private FrameLayout mFrameLayout;
    private AbsoluteLayout mAbsoluteLayout;
    
    @Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        
        setContentView(R.layout.drawable_background_minimum_size);
        
        mBackgroundDrawable = getResources().getDrawable(R.drawable.drawable_background);
        mBigBackgroundDrawable = getResources().getDrawable(R.drawable.big_drawable_background);
 
        mChangeBackgroundsButton = (Button) findViewById(R.id.change_backgrounds);
        mChangeBackgroundsButton.setOnClickListener(this);
        
        mTextView = (TextView) findViewById(R.id.text_view);
        mLinearLayout = (LinearLayout) findViewById(R.id.linear_layout);
        mRelativeLayout = (RelativeLayout) findViewById(R.id.relative_layout);
        mFrameLayout = (FrameLayout) findViewById(R.id.frame_layout);
        mAbsoluteLayout = (AbsoluteLayout) findViewById(R.id.absolute_layout);

        changeBackgrounds(mBackgroundDrawable);
    }

    private void changeBackgrounds(Drawable newBg) {
        mTextView.setBackgroundDrawable(newBg);
        mLinearLayout.setBackgroundDrawable(newBg);
        mRelativeLayout.setBackgroundDrawable(newBg);
        mFrameLayout.setBackgroundDrawable(newBg);
        mAbsoluteLayout.setBackgroundDrawable(newBg);
    }
    
    public void onClick(View v) {
        if (mUsingBigBg) {
            changeBackgrounds(mBackgroundDrawable);
        } else {
            changeBackgrounds(mBigBackgroundDrawable);
        }
        
        mUsingBigBg = !mUsingBigBg;
    }
    
}