android刮刮奖效果(刮刮奖软件下载)

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android刮刮奖效果

自定义View盖在textView上

import android.content.Context;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;public class EraseView extends View { private boolean isMove = false; private Bitmap bitmap = null; private Bitmap frontBitmap = null; private Path path; private Canvas mCanvas; private Paint paint; public EraseView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onDraw(Canvas canvas) { if (mCanvas == null) { EraseBitmp(); } canvas.drawBitmap(bitmap, 0, 0, null); mCanvas.drawPath(path,paint); super.onDraw(canvas); } public void EraseBitmp() { bitmap = Bitmap.createBitmap(getWidth(),getHeight(), Bitmap.Config.ARGB_); frontBitmap = CreateBitmap(Color.GRAY,getWidth(),getHeight()); paint = new Paint(); paint.setStyle(Paint.Style.STROKE); paint.setXfermode(new PorterDuffXfermode(Mode.CLEAR)); paint.setAntiAlias(true); paint.setDither(true); paint.setStrokeJoin(Paint.Join.ROUND); paint.setStrokeCap(Paint.Cap.ROUND); paint.setStrokeWidth(); path = new Path(); mCanvas = new Canvas(bitmap); mCanvas.drawBitmap(frontBitmap, 0, 0,null); } @Override public boolean onTouchEvent(MotionEvent event) { float ax = event.getX(); float ay = event.getY(); if (event.getAction() == MotionEvent.ACTION_DOWN) { isMove = false; path.reset(); path.moveTo(ax, ay); invalidate(); return true; } else if (event.getAction() == MotionEvent.ACTION_MOVE) { isMove = true; path.lineTo(ax,ay); invalidate(); return true; } return super.onTouchEvent(event); } public Bitmap CreateBitmap(int color,int width, int height) { int[] rgb = new int [width * height]; for (int i=0;i<rgb.length;i&#;&#;) { rgb[i] = color; } return Bitmap.createBitmap(rgb, width, height,Config.ARGB_); } }

布局文件

<LinearLayout xmlns:android=" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="dp" android:layout_marginTop="dp" > <TextView android:id="@&#;id/tv_main_msg" android:layout_width="dp" android:layout_height="dp" android:background="@android:color/holo_red_dark" android:gravity="center_vertical|center_horizontal" android:text="你没中奖" android:textSize="sp" /> <com.example.guale.EraseView android:id="@&#;id/eraseView1" android:layout_width="dp" android:layout_height="dp" /> </RelativeLayout></LinearLayout>

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