代码摘自网络,仅供参考
import java.io.IOException; import java.io.InputStream; import android.app.Activity; import android.content.Context; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.widget.ImageView; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import com.enrique.stackblur.StackBlurManager; public class MainActivity extends Activity { private ImageView iv; private SeekBar seekBar; private StackBlurManager stackBlurManager; private String IMAGE_TO_ANALYZE = "android_platform_256.png"; private int blurMode=0; private int radius=30; private int step=2; Handler handler = new Handler(); Runnable runnable = new Runnable() { @Override public void run() { // TODO Auto-generated method stub radius -= step; if (radius < 0) { handler.removeCallbacks(runnable); return; } onBlur(radius); handler.postDelayed(this, 30); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); iv=(ImageView)findViewById(R.id.imageView); seekBar=(SeekBar)findViewById(R.id.blur_amount); stackBlurManager = new StackBlurManager(getBitmapFromAsset(this, "av.png")); onBlur(radius); handler.postDelayed(runnable, 1000); seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { int radius = progress; onBlur(radius); } }); } private Bitmap getBitmapFromAsset(Context context, String strName) { AssetManager assetManager = context.getAssets(); InputStream is=null; Bitmap bitmap = null; try { is = assetManager.open(strName); bitmap = BitmapFactory.decodeStream(is); } catch (IOException e) { return null; } return bitmap; } public void setBlurMode(int mode) { this.blurMode = mode; onBlur(radius); } private void onBlur(int radius) { switch(blurMode) { case 0: iv.setImageBitmap( stackBlurManager.process(radius) ); break; case 1: iv.setImageBitmap( stackBlurManager.processNatively(radius) ); break; case 2: iv.setImageBitmap( stackBlurManager.processRenderScript(this, radius) ); break; } } }
XML
<LinearLayout 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:background="#FFF" android:gravity="center_horizontal" android:orientation="vertical" > <SeekBar android:id="@+id/blur_amount" android:layout_width="match_parent" android:layout_height="wrap_content" android:max="50" /> <ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
下面提供一个C++版本的,效率高很多嘛,不多说。github地址: ImageBlurring
本地下载:ImageBlurring-master
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