Android实现图片 高斯模糊，以及图片镜像 翻转。
16lz
2021-01-26
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
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