Android实现图片 高斯模糊，以及图片镜像 翻转。
好久没写博客，发现不止手痒，，原来不学习还是会颓废的…..
哎…..
速速找了网上比较感兴趣的功能，，看着前人大神门的方法实现,方便自己也方便别人：
上图：
代码：
MainActivity.class
package com.hero.zhaoq.bitmapdemo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
/**
* Android实现镜像效果
*/
public class MainActivity extends AppCompatActivity {
private ImageView imageView1;
private ImageView imageView2;
private ImageView imageView3;
private ImageView imageView4;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
//
private void initView() {
imageView1 = (ImageView) findViewById(R.id.imageView1);
imageView2 = (ImageView) findViewById(R.id.imageView2);
imageView3 = (ImageView) findViewById(R.id.imageView3);
imageView4 = (ImageView) findViewById(R.id.imageView4);
//获取资源图片
Bitmap bm = BitmapFactory.decodeResource(getResources(),R.mipmap.demo);
//显示原图形
imageView1.setImageBitmap(bm);
//处理
Bitmap modBm = Bitmap.createBitmap(bm.getWidth(),bm.getHeight(),bm.getConfig());
//处理画布 重新绘制图形 形成镜像
Canvas canvas = new Canvas(modBm);
Paint paint = new Paint();
// paint.setColor(Color.BLACK);
// paint.setAntiAlias(true);
//绘制矩阵 Matrix主要用于对平面进行平移(Translate)，缩放(Scale)，旋转(Rotate)以及斜切(Skew)操作。
Matrix matrix = new Matrix();
// matrix.setRotate(90,bm.getWidth()/2,bm.getHeight());
// matrix.setTranslate(20,20);
//镜子效果：
matrix.setScale(-1,1);//翻转
matrix.postTranslate(bm.getWidth(),0);
canvas.drawBitmap(bm,matrix,paint);
imageView2.setImageBitmap(modBm);
Bitmap bm2 = BitmapFactory.decodeResource(getResources(),R.mipmap.demo);
imageView3.setImageBitmap(blurBitmap(bm2));
//设置 触摸事件 实现 触摸改变 模糊状态
imageView3.setOnTouchListener(new View.OnTouchListener() {
private float mLastY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastY = event.getY();
break;
case MotionEvent.ACTION_MOVE:
float y = event.getY();
float alphaDelt = (y - mLastY) / 1000;
float alpha = imageView3.getAlpha() + alphaDelt;
if (alpha > 1.0) {
alpha = 1.0f;
} else if (alpha < 0.0) {
alpha = 0.0f;
}
imageView3.setAlpha(alpha);
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
});
Bitmap bm3 = BitmapFactory.decodeResource(getResources(),R.mipmap.demo);
imageView4.setImageBitmap(blurBitmap(bm3));
//设置 触摸事件 实现 触摸改变 模糊状态
imageView4.setOnTouchListener(new View.OnTouchListener() {
private float mLastY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastY = event.getY();
break;
case MotionEvent.ACTION_MOVE:
float y = event.getY();
float alphaDelt = (y - mLastY) / 1000;
float alpha = imageView4.getAlpha() + alphaDelt;
if (alpha > 1.0) {
alpha = 1.0f;
} else if (alpha < 0.0) {
alpha = 0.0f;
}
imageView4.setAlpha(alpha);
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
});
}
//该方法 要求版本最低为 17 API
public Bitmap blurBitmap(Bitmap bitmap){
//Let's create an empty bitmap with the same size of the bitmap we want to blur
Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
//Instantiate a new Renderscript
RenderScript rs = RenderScript.create(getApplicationContext());
//Create an Intrinsic Blur Script using the Renderscript
ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
//Create the Allocations (in/out) with the Renderscript and the in/out bitmaps
Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);
//Set the radius of the blur
blurScript.setRadius(5.f);
//Perform the Renderscript
blurScript.setInput(allIn);
blurScript.forEach(allOut);
//Copy the final bitmap created by the out Allocation to the outBitmap
allOut.copyTo(outBitmap);
//recycle the original bitmap
bitmap.recycle();
//After finishing everything, we destroy the Renderscript.
rs.destroy();
return outBitmap;
}
//高斯模糊 方法二 效率较低：
public static Bitmap doBlur(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {
// Stack Blur v1.0 from
// http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
//
// Java Author: Mario Klingemann github源码：https://github.com/zqHero/BitmapDemo