Android 刮刮乐
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<!--
<com.example.rubbler.Text_Rubbler
android:id="@+id/rubbler"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:text="@string/hello_world" />
-->
<com.example.rubbler.Image_Rubbler
android:id="@+id/rubbler"
android:background="@drawable/girl1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center" />
</RelativeLayout>
package com.example.rubbler;
import com.example.rubbler.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Text_Rubbler rubbler = (Text_Rubbler)this.findViewById(R.id.rubbler);
Image_Rubbler rubbler = (Image_Rubbler) this.findViewById(R.id.rubbler);
rubbler.beginRubbler(0xffff0000, 40, 50);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
package com.example.rubbler;
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;
import android.graphics.PorterDuffXfermode;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.widget.ImageView;
public class Image_Rubbler extends ImageView
{
private float TOUCH_TOLERANCE; //填充距离,使线条更自然,柔和,值越小,越柔和。
// private final int bgColor;
private Bitmap mBitmap;
private Canvas mCanvas;
private Paint mPaint;
private Path mPath;
private float mX, mY;
private boolean isDraw = false;
public Image_Rubbler(Context context)
{
super(context);
}
public Image_Rubbler(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
// bgColor = attrs.getAttributeIntValue("http://schemas.android.com/apk/res/android", "textColor", 0xFFFFFF);
// System.out.println("Color:"+bgColor);
}
public Image_Rubbler(Context context, AttributeSet attrs)
{
super(context, attrs);
// bgColor = attrs.getAttributeIntValue("http://schemas.android.com/apk/res/android", "textColor", 0xFFFFFF);
// System.out.println(bgColor);
// System.out.println(attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "layout_width"));
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
if (isDraw)
{
mCanvas.drawPath(mPath, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, null);
}
}
/**
* 开启檫除功能
* @param bgColor 覆盖的背景颜色
* @param paintStrokeWidth 触点(橡皮)宽度
* @param touchTolerance 填充距离,值越小,越柔和。
*/
public void beginRubbler(final int bgColor , final int paintStrokeWidth , float touchTolerance)
{
TOUCH_TOLERANCE = touchTolerance;
//设置画笔
mPaint = new Paint();
//mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
//或者
mPaint.setAlpha(0);
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND); //前圆角
mPaint.setStrokeCap(Paint.Cap.ROUND); //后圆角
mPaint.setStrokeWidth(paintStrokeWidth); //笔宽
//痕迹
mPath = new Path();
//覆盖
// if (getLayoutParams().width == LayoutParams.FILL_PARENT) {
//
// }
int width = this.getResources().getDrawable(R.drawable.girl1).getIntrinsicWidth();
int height = this.getResources().getDrawable(R.drawable.girl1).getIntrinsicHeight();
mBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mCanvas.drawColor(bgColor);
isDraw = true;
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
if (!isDraw)
{
return true;
}
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN: //触点按下
// touchDown(event.getRawX(),event.getRawY());
touchDown(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_MOVE: //触点移动
touchMove(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_UP: //触点弹起
touchUp(event.getX(), event.getY());
invalidate();
break;
default:
break;
}
return true;
}
private void touchDown(float x , float y)
{
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touchMove(float x , float y)
{
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE)
{
mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
mX = x;
mY = y;
}
}
private void touchUp(float x , float y)
{
mPath.lineTo(x, y);
mCanvas.drawPath(mPath, mPaint);
mPath.reset();
int w = mBitmap.getWidth();
int h = mBitmap.getHeight();
int[] pixels = new int[w * h];
try
{
/*
参数
pixels 接收位图颜色值的数组
offset 写入到pixels[]中的第一个像素索引值
stride pixels[]中的行间距个数值(必须大于等于位图宽度)。可以为负数
x 从位图中读取的第一个像素的x坐标值。
y 从位图中读取的第一个像素的y坐标值
width 从每一行中读取的像素宽度
height 读取的行数
*/
mBitmap.getPixels(pixels, 0, w, 0, 0, w, h);
int rubblerCount = 0;
int bitmapCount = pixels.length;
for (int i = 0; i < bitmapCount; i++)
{
if (pixels[i] != 0xffff0000)
{
rubblerCount++;
}
}
if (rubblerCount > bitmapCount * 0.3)
{
setFlickerAnimation(this);
Paint paint = new Paint();
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
mCanvas.drawPaint(paint);
isDraw = false;
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
//闪烁
private void setFlickerAnimation(ImageView iv_chat_head)
{
final Animation animation = new AlphaAnimation(1, 0); // Change alpha from fully visible to invisible
animation.setDuration(50); // duration - half a second
animation.setInterpolator(new LinearInterpolator()); // do not alter animation rate
// animation.setRepeatCount(Animation.INFINITE); // Repeat animation infinitely
// animation.setRepeatCount(2); // Repeat animation infinitely
animation.setRepeatMode(Animation.REVERSE); //
iv_chat_head.setAnimation(animation);
}
}
package com.example.rubbler;
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;
import android.graphics.PorterDuffXfermode;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.TextView;
public class Text_Rubbler extends TextView
{
private float TOUCH_TOLERANCE; //填充距离,使线条更自然,柔和,值越小,越柔和。
// private final int bgColor;
private Bitmap mBitmap;
private Canvas mCanvas;
private Paint mPaint;
private Path mPath;
private float mX, mY;
private boolean isDraw = false;
public Text_Rubbler(Context context)
{
super(context);
}
public Text_Rubbler(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
// bgColor = attrs.getAttributeIntValue("http://schemas.android.com/apk/res/android", "textColor", 0xFFFFFF);
// System.out.println("Color:"+bgColor);
}
public Text_Rubbler(Context context, AttributeSet attrs)
{
super(context, attrs);
// bgColor = attrs.getAttributeIntValue("http://schemas.android.com/apk/res/android", "textColor", 0xFFFFFF);
// System.out.println(bgColor);
// System.out.println(attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "layout_width"));
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
if (isDraw)
{
mCanvas.drawPath(mPath, mPaint);
// mCanvas.drawPoint(mX, mY, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, null);
}
}
/**
* 开启檫除功能
* @param bgColor 覆盖的背景颜色
* @param paintStrokeWidth 触点(橡皮)宽度
* @param touchTolerance 填充距离,值越小,越柔和。
*/
public void beginRubbler(final int bgColor , final int paintStrokeWidth , float touchTolerance)
{
TOUCH_TOLERANCE = touchTolerance;
//设置画笔
mPaint = new Paint();
// mPaint.setAlpha(0);
//画笔划过的痕迹就变成透明色了
mPaint.setColor(Color.BLACK); //此处不能为透明色
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
//或者
// mPaint.setAlpha(0);
// mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND); //前圆角
mPaint.setStrokeCap(Paint.Cap.ROUND); //后圆角
mPaint.setStrokeWidth(paintStrokeWidth); //笔宽
//痕迹
mPath = new Path();
;
//覆盖
// if (getLayoutParams().width == LayoutParams.FILL_PARENT) {
//
// }
mBitmap = Bitmap.createBitmap(getLayoutParams().width, getLayoutParams().height, Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mCanvas.drawColor(bgColor);
isDraw = true;
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
if (!isDraw)
{
return true;
}
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN: //触点按下
// touchDown(event.getRawX(),event.getRawY());
touchDown(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_MOVE: //触点移动
touchMove(event.getX(), event.getY());
invalidate();
break;
case MotionEvent.ACTION_UP: //触点弹起
touchUp(event.getX(), event.getY());
invalidate();
break;
default:
break;
}
return true;
}
private void touchDown(float x , float y)
{
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touchMove(float x , float y)
{
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE)
{
mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
mX = x;
mY = y;
}
}
private void touchUp(float x , float y)
{
mPath.lineTo(x, y);
mCanvas.drawPath(mPath, mPaint);
mPath.reset();
}
}