Android example source code file (TrackingPatternView.java)

This example Android source code file (TrackingPatternView.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

android, attributeset, bitmap, content, drawing, graphics, override, paint, trackingpatternview, ui, util, utilities, utils

The TrackingPatternView.java Android example source code

/*
 * Copyright (C) 2008 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.android.server.status;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.util.Slog;
import android.view.View;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap;
import android.graphics.Paint;
import android.graphics.Canvas;

public class TrackingPatternView extends View {
    private Bitmap mTexture;
    private Paint mPaint;
    private int mTextureWidth;
    private int mTextureHeight;
    
    public TrackingPatternView(Context context, AttributeSet attrs) {
        super(context, attrs);

        mTexture = BitmapFactory.decodeResource(getResources(), 
                com.android.internal.R.drawable.status_bar_background);
        mTextureWidth = mTexture.getWidth();
        mTextureHeight = mTexture.getHeight();

        mPaint = new Paint();
        mPaint.setDither(false);
    }

    @Override
    public void onDraw(Canvas canvas) {
        final Bitmap texture = mTexture;
        final Paint paint = mPaint;

        final int width = getWidth();
        final int height = getHeight();

        final int textureWidth = mTextureWidth;
        final int textureHeight = mTextureHeight;

        int x = 0;
        int y;

        while (x < width) {
            y = 0;
            while (y < height) {
                canvas.drawBitmap(texture, x, y, paint);
                y += textureHeight;
            }
            x += textureWidth;
        }
    }
}