Android 实现高斯模糊的几种方式

最近在搞图片的显示，做了一个高斯模糊的效果，使用的是gitgub上写好的效果，

https://github.com/qiujuer/ImageBlurring

效果图如下，

1.
（1）xml文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.afanbaby.gaussfuzzydemo.MainActivity">


    <Button  android:id="@+id/javaBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="JAVA" />

    <Button  android:id="@+id/bjnBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Bitmap JNI Native" />

    <Button  android:id="@+id/pjnBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Pixels JNI Native" />

    <ImageView  android:id="@+id/image" android:layout_width="match_parent" android:layout_height="276dp" android:background="@drawable/love" android:scaleType="fitXY" />

    <SeekBar  android:id="@+id/seekBar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" />

    <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal">

        <TextView  android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginTop="2dp" android:text="0" android:textSize="16sp" />

        <TextView  android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" />

        <Button  android:id="@+id/otherBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="5dp" android:text="其他实现方式" />

    LinearLayout>

LinearLayout>

（2）MainActivity：

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
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.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

import net.qiujuer.genius.blur.StackBlur;

import static android.R.attr.radius;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button javaBtn, bjnBtn, pjnBtn, otherBtn;
    private ImageView imageView;
    private int radius = 0;
    private SeekBar seekBar;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        javaBtn = (Button) findViewById(R.id.javaBtn);
        bjnBtn = (Button) findViewById(R.id.bjnBtn);
        pjnBtn = (Button) findViewById(R.id.pjnBtn);
        otherBtn = (Button) findViewById(R.id.otherBtn);
        imageView = (ImageView) findViewById(R.id.image);
        seekBar = (SeekBar) findViewById(R.id.seekBar);
        textView = (TextView) findViewById(R.id.text);
        javaBtn.setOnClickListener(this);
        bjnBtn.setOnClickListener(this);
        pjnBtn.setOnClickListener(this);
        otherBtn.setOnClickListener(this);

        seekBar.setMax(100);
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                Bitmap mBitmap1 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                // Java
                Bitmap newBitmap1 = StackBlur.blur(mBitmap1, (int) i, false);
                imageView.setImageBitmap(newBitmap1);

                textView.setText(i + "");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.javaBtn:
                Bitmap mBitmap1 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                // Java
                Bitmap newBitmap1 = StackBlur.blur(mBitmap1, 20, false);
                imageView.setImageBitmap(newBitmap1);
                Toast.makeText(this, "使用java实现", Toast.LENGTH_SHORT).show();
                break;
            case R.id.bjnBtn:
                Bitmap mBitmap2 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                // Bitmap JNI Native
                Bitmap newBitmap2 = StackBlur.blurNatively(mBitmap2, 20, false);
                imageView.setImageBitmap(newBitmap2);
                Toast.makeText(this, "使用Bitmap JNI Native实现", Toast.LENGTH_SHORT).show();
                break;
            case R.id.pjnBtn:
                Bitmap mBitmap3 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                // Pixels JNI Native
                Bitmap newBitmap3 = StackBlur.blurNativelyPixels(mBitmap3, 20, false);
                imageView.setImageBitmap(newBitmap3);
                Toast.makeText(this, "使用Pixels JNI Native实现", Toast.LENGTH_SHORT).show();
                break;

            case R.id.otherBtn:
                startActivity(new Intent(this, TwoActivity.class));
                break;
        }
    }

}

2.当然我们还可以通过RenderScriprt，Glide方式来实现，
（1）xml布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">

    <Button  android:id="@+id/renderScriprtBtn" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="RenderScriprt" />


    <Button  android:id="@+id/glideBtn" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Glide" />


    <ImageView  android:id="@+id/image2" android:layout_width="match_parent" android:layout_height="276dp" android:background="@drawable/love" android:scaleType="fitXY" />

    <SeekBar  android:id="@+id/seekBar2" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" />

    <TextView  android:id="@+id/text2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="o" />
LinearLayout>

（2）TwoActivity：

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;

import jp.wasabeef.glide.transformations.BlurTransformation;

/** * Created by afanbaby on 2017/9/19. */

public class TwoActivity extends AppCompatActivity implements View.OnClickListener {

    private Button renderScriprtBtn, glideBtn;
    private ImageView imageView;
    private SeekBar seekBar;
    private TextView textView;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);

        renderScriprtBtn = (Button) findViewById(R.id.renderScriprtBtn);
        glideBtn = (Button) findViewById(R.id.glideBtn);
        imageView = (ImageView) findViewById(R.id.image2);
        seekBar = (SeekBar) findViewById(R.id.seekBar2);
        textView = (TextView) findViewById(R.id.text2);
        renderScriprtBtn.setOnClickListener(this);
        glideBtn.setOnClickListener(this);

        seekBar.setMax(25);
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                Bitmap mBitmap1 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                Bitmap bitmap = blurBitmap(TwoActivity.this, mBitmap1, i);
                imageView.setImageBitmap(bitmap);
                textView.setText(i + "");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.renderScriprtBtn:
                Toast.makeText(this, "RenderScriprt实现高斯模糊", Toast.LENGTH_SHORT).show();
                Bitmap mBitmap1 = ((BitmapDrawable) getResources().getDrawable(R.drawable.love)).getBitmap();
                Bitmap bitmap = blurBitmap(this, mBitmap1, 15);
                imageView.setImageBitmap(bitmap);
                break;

            case R.id.glideBtn:
                Toast.makeText(this, "Glide实现高斯模糊", Toast.LENGTH_SHORT).show();
                Glide.with(this).load(R.drawable.love).bitmapTransform(new BlurTransformation(this, 25)).into(imageView);

                break;
        }
    }

    /** * 获取模糊的图片 * * @param context 上下文对象 * @param bitmap 传入的bitmap图片 * @param radius 模糊度（Radius最大只能设置25.f） * @return */
    public static Bitmap blurBitmap(Context context, Bitmap bitmap, int radius) {
        //用需要创建高斯模糊bitmap创建一个空的bitmap
        Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
        // 初始化Renderscript，该类提供了RenderScript context，创建其他RS类之前必须先创建这个类，其控制RenderScript的初始化，资源管理及释放
        RenderScript rs = RenderScript.create(context);
        // 创建高斯模糊对象
        ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
        // 创建Allocations，此类是将数据传递给RenderScript内核的主要方 法，并制定一个后备类型存储给定类型
        Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
        Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);
        //设定模糊度(注：Radius最大只能设置25.f)
        blurScript.setRadius(radius);
        // 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;
    }
}

3.demo地址

http://download.csdn.net/download/afanbaby/9990015

本人菜鸟一个，有什么不对的地方希望大家指出评论，大神勿喷，希望大家一起学习进步！