1 import android.content.Context;
2 import android.graphics.Bitmap;
3 import android.graphics.Bitmap.Config;
4 import android.graphics.Canvas;
5 import android.graphics.Color;
6 import android.graphics.Paint;
7 import android.graphics.Path;
8 import android.graphics.PorterDuff;
9 import android.graphics.PorterDuffXfermode;
10 import android.util.AttributeSet;
11 import android.view.MotionEvent;
12 import android.widget.TextView;
13
14 /** 15 * 橡皮檫功能，类似刮刮乐效果 16 */ 17 public class Text_Rubbler extends TextView { 18 19 // 填充距离，使线条更自然，柔和,值越小，越柔和。 20 private float TOUCH_TOLERANCE; 21 22 private Bitmap mBitmap; 23 private Canvas mCanvas; 24 private Paint mPaint; 25 private Path mPath; 26 private float mX, mY; 27 28 private boolean isDraw = false; 29 30 public Text_Rubbler(Context context) { 31 super(context); 32 } 33 34 public Text_Rubbler(Context context, AttributeSet attrs, int defStyle) { 35 super(context, attrs, defStyle); 36 } 37 38 public Text_Rubbler(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 } 41 42 @Override 43 protected void onDraw(Canvas canvas) { 44 super.onDraw(canvas); 45 if (isDraw) { 46 mCanvas.drawPath(mPath, mPaint); 47 // mCanvas.drawPoint(mX, mY, mPaint); 48 canvas.drawBitmap(mBitmap, 0, 0, null); 49 } 50 } 51 52 /** 53 * 开启檫除功能 54 * 55 * @param bgColor 56 * 覆盖的背景颜色 57 * @param paintStrokeWidth 58 * 触点（橡皮）宽度 59 * @param touchTolerance 60 * 填充距离,值越小，越柔和。 61 */ 62 public void beginRubbler(final int bgColor, final int paintStrokeWidth, 63 float touchTolerance) { 64 TOUCH_TOLERANCE = touchTolerance; 65 // 设置画笔 66 mPaint = new Paint(); 67 mPaint.setAlpha(0); 68 // 画笔划过的痕迹就变成透明色了 69 mPaint.setColor(Color.BLACK); // 此处不能为透明色 70 mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 71 // 或者 72 // mPaint.setAlpha(0); 73 // mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN)); 74 75 mPaint.setAntiAlias(true); 76 mPaint.setDither(true); 77 mPaint.setStyle(Paint.Style.STROKE); 78 mPaint.setStrokeJoin(Paint.Join.ROUND); // 前圆角 79 mPaint.setStrokeCap(Paint.Cap.ROUND); // 后圆角 80 mPaint.setStrokeWidth(paintStrokeWidth); // 笔宽 81 82 // 痕迹 83 mPath = new Path(); 84 ; 85 // 覆盖 86 // if (getLayoutParams().width == LayoutParams.FILL_PARENT) { 87 // 88 // } 89 mBitmap = Bitmap.createBitmap(getLayoutParams().width, 90 getLayoutParams().height, Config.ARGB_8888); 91 mCanvas = new Canvas(mBitmap); 92 93 mCanvas.drawColor(bgColor); 94 isDraw = true; 95 } 96 97 @Override 98 public boolean onTouchEvent(MotionEvent event) { 99 if (!isDraw) { 100 return true; 101 } 102 switch (event.getAction()) { 103 case MotionEvent.ACTION_DOWN: // 触点按下 104 // touchDown(event.getRawX(),event.getRawY()); 105 touchDown(event.getX(), event.getY()); 106 invalidate(); 107 break; 108 case MotionEvent.ACTION_MOVE: // 触点移动 109 touchMove(event.getX(), event.getY()); 110 invalidate(); 111 break; 112 case MotionEvent.ACTION_UP: // 触点弹起 113 touchUp(event.getX(), event.getY()); 114 invalidate(); 115 break; 116 default: 117 break; 118 } 119 return true; 120 } 121 122 private void touchDown(float x, float y) { 123 mPath.reset(); 124 mPath.moveTo(x, y); 125 mX = x; 126 mY = y; 127 } 128 129 private void touchMove(float x, float y) { 130 float dx = Math.abs(x - mX); 131 float dy = Math.abs(y - mY); 132 if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) { 133 mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2); 134 mX = x; 135 mY = y; 136 } 137 } 138 139 private void touchUp(float x, float y) { 140 mPath.lineTo(x, y); 141 mCanvas.drawPath(mPath, mPaint); 142 mPath.reset(); 143 } 144 145 }
1 <?xml version="1.0" encoding="utf-8"?>
2 <RelativeLayout
3 xmlns:android="http://schemas.android.com/apk/res/android"
4 android:layout_width="fill_parent"
5 android:layout_height="fill_parent"
6 android:background="@drawable/make_bg"
7 android:orientation="vertical" >
8
9 <RelativeLayout
10 android:id="@+id/prize_title"
11 android:layout_width="wrap_content"
12 android:layout_height="wrap_content"
13 android:layout_centerHorizontal="true"
14 android:layout_centerVertical="true"
15 android:layout_margin="10dp" >
16
17 <TextView
18 android:id="@+id/prize_to1"
19 android:layout_width="wrap_content"
20 android:layout_height="wrap_content"
21 android:text="活动规则"
22 android:textColor="#ffd249"
23 android:textSize="20sp" />
24
25 <TextView
26 android:id="@+id/prize_to2"
27 android:layout_width="wrap_content"
28 android:layout_height="wrap_content"
29 android:layout_below="@+id/prize_to1"
30 android:text="1.活动时间\n 2013年11月21日起~2014年1月1日止\n2.活动内容\n 活动期间,登陆游戏即有机会抽取4999红包大奖"
31 android:textColor="#fff" />
32 </RelativeLayout>
33
34 <ImageView
35 android:id="@+id/ima"
36 android:layout_width="wrap_content"
37 android:layout_height="wrap_content"
38 android:layout_above="@+id/prize_title"
39 android:layout_centerHorizontal="true"
40 android:background="@drawable/mm_gold"
41 android:padding="10dp" />
42
43 <!-- 44 必须设置 45 android:layout_width 46 android:layout_height 47 的值为常量 48 -->
49
50 <org.delmore.rubble.Text_Rubbler 51 android:id="@+id/rubbler" 52 android:layout_width="235dip" 53 android:layout_height="60dip" 54 android:layout_below="@+id/prize_title" 55 android:layout_centerHorizontal="true" 56 android:gravity="center" 57 android:padding="10dp" 58 android:text="怎么可能\n会中奖!" 59 android:textColor="#FFF" />
61 </RelativeLayout>
1 import android.content.Context;
2 import android.graphics.Bitmap;
3 import android.graphics.Bitmap.Config;
4 import android.graphics.Canvas;
5 import android.graphics.Color;
6 import android.graphics.Paint;
7 import android.graphics.Path;
8 import android.graphics.PorterDuff;
9 import android.graphics.PorterDuffXfermode;
10 import android.util.AttributeSet;
11 import android.view.MotionEvent;
12 import android.widget.TextView;
13
14 /** 15 * 橡皮檫功能，类似刮刮乐效果 16 */ 17 public class Text_Rubbler extends TextView { 19 // 填充距离，使线条更自然，柔和,值越小，越柔和。 20 private float TOUCH_TOLERANCE; 22 private Bitmap mBitmap; 23 private Canvas mCanvas; 24 private Paint mPaint; 25 private Path mPath; 26 private float mX, mY; 28 private boolean isDraw = false; 29 30 public Text_Rubbler(Context context) { 31 super(context); 32 } 33 34 public Text_Rubbler(Context context, AttributeSet attrs, int defStyle) { 35 super(context, attrs, defStyle); 36 } 37 38 public Text_Rubbler(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 } 41 42 @Override 43 protected void onDraw(Canvas canvas) { 44 super.onDraw(canvas); 45 if (isDraw) { 46 mCanvas.drawPath(mPath, mPaint); 47 // mCanvas.drawPoint(mX, mY, mPaint); 48 canvas.drawBitmap(mBitmap, 0, 0, null); 49 } 50 } 51 52 /** 53 * 开启檫除功能 54 * 55 * @param bgColor 56 * 覆盖的背景颜色 57 * @param paintStrokeWidth 58 * 触点（橡皮）宽度 59 * @param touchTolerance 60 * 填充距离,值越小，越柔和。 61 */ 62 public void beginRubbler(final int bgColor,
final int paintStrokeWidth,float touchTolerance) { 64 TOUCH_TOLERANCE = touchTolerance; 65 // 设置画笔 66 mPaint = new Paint(); 67 mPaint.setAlpha(0); 68 // 画笔划过的痕迹就变成透明色了 69 mPaint.setColor(Color.BLACK); // 此处不能为透明色 70 mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 71 // 或者 72 // mPaint.setAlpha(0); 73 // mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN)); 74 75 mPaint.setAntiAlias(true); 76 mPaint.setDither(true); 77 mPaint.setStyle(Paint.Style.STROKE); 78 mPaint.setStrokeJoin(Paint.Join.ROUND); // 前圆角 79 mPaint.setStrokeCap(Paint.Cap.ROUND); // 后圆角 80 mPaint.setStrokeWidth(paintStrokeWidth); // 笔宽 81 82 // 痕迹 83 mPath = new Path(); 84 ; 85 // 覆盖 86 // if (getLayoutParams().width == LayoutParams.FILL_PARENT) { 87 // 88 // } 89 mBitmap = Bitmap.createBitmap(getLayoutParams().width, 90 getLayoutParams().height, Config.ARGB_8888); 91 mCanvas = new Canvas(mBitmap); 92 93 mCanvas.drawColor(bgColor); 94 isDraw = true; 95 } 96 97 @Override 98 public boolean onTouchEvent(MotionEvent event) { 99 if (!isDraw) { 100 return true; 101 } 102 switch (event.getAction()) { 103 case MotionEvent.ACTION_DOWN: // 触点按下 104 // touchDown(event.getRawX(),event.getRawY()); 105 touchDown(event.getX(), event.getY()); 106 invalidate(); 107 break; 108 case MotionEvent.ACTION_MOVE: // 触点移动 109 touchMove(event.getX(), event.getY()); 110 invalidate(); 111 break; 112 case MotionEvent.ACTION_UP: // 触点弹起 113 touchUp(event.getX(), event.getY()); 114 invalidate(); 115 break; 116 default: 117 break; 118 } 119 return true; 120 } 121 122 private void touchDown(float x, float y) { 123 mPath.reset(); 124 mPath.moveTo(x, y); 125 mX = x; 126 mY = y; 127 } 128 129 private void touchMove(float x, float y) { 130 float dx = Math.abs(x - mX); 131 float dy = Math.abs(y - mY); 132 if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) { 133 mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2); 134 mX = x; 135 mY = y; 136 } 137 } 138 139 private void touchUp(float x, float y) { 140 mPath.lineTo(x, y); 141 mCanvas.drawPath(mPath, mPaint); 142 mPath.reset(); 143 } 144 145 }
