renderscript-v8.jar的简单使用

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这个库主要是对图形的处理，模糊，渲染

需要的操作，加入v8库，支持这个jar包的目录在\sdk\build-tools\里面

，如下两张图，因为build-tools大家的目录可能不一样，老的是上边那个目录，新的是下边的。

之后记得在project.properties添加如下选中的那行代码，否则运行的时候会报错提示找不到库的

xml代码如下：

 <ImageView        android:id="@+id/image_normal"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:layout_margin="5dp"        android:scaleType="center"/>    <ImageView        android:id="@+id/image_blurred"        android:layout_width="match_parent"      android:layout_height="0dp"        android:layout_weight="1"        android:layout_margin="5dp"        android:scaleType="center"/>    <ImageView        android:id="@+id/image_colored"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:layout_margin="5dp"        android:scaleType="center"/>

activity中使用：

mNormalImage = (ImageView) findViewById(R.id.image_normal);        mBlurImage = (ImageView) findViewById(R.id.image_blurred);        mColorImage = (ImageView) findViewById(R.id.image_colored);        //mColorImageHalf = (ImageView) findViewById(R.id.image_colored_half);         //Start with an image from our APK resources        Bitmap inBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.data);        Bitmap outBitmap = inBitmap.copy(inBitmap.getConfig(), true);        Bitmap grayBitmap = inBitmap.copy(inBitmap.getConfig(), true);        //Bitmap  halfBitmap=Bitmap.createBitmap(inBitmap.getWidth(), inBitmap.getHeight(), inBitmap.getConfig());                //Create the context and I/O allocations        final RenderScript rs = RenderScript.create(this);        final Allocation input = Allocation.createFromBitmap(rs, inBitmap,                Allocation.MipmapControl.MIPMAP_NONE,                Allocation.USAGE_SCRIPT);        final Allocation output = Allocation.createTyped(rs, input.getType());         //Blur the image        final ScriptIntrinsicBlur script =                ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));        script.setRadius(6f);        script.setInput(input);        script.forEach(output);        output.copyTo(outBitmap);         //Make the image greyscale        final ScriptIntrinsicColorMatrix scriptColor =                ScriptIntrinsicColorMatrix.create(rs, Element.U8_4(rs));        scriptColor.setGreyscale();        scriptColor.forEach(input, output);        output.copyTo(grayBitmap);

        mNormalImage.setImageBitmap(inBitmap);        mBlurImage.setImageBitmap(outBitmap);        mColorImage.setImageBitmap(grayBitmap);        //mColorImageHalf.setImageBitmap(halfBitmap);        //We don't need RenderScript anymore        rs.destroy();

效果图：

以上为简单的使用，其他的用法可以参考android提供的example，目录如下：

下面为demo中的代码，复制下来方便查找：

<FrameLayout 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="#0099cc"    tools:context=".MainActivity_old">    <ImageView        android:id="@+id/imageView"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:scaleType="fitCenter"        android:src="@drawable/data" /><RadioGroup        android:id="@+id/radioGroup1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_gravity="center"        android:orientation="horizontal"        android:layout_above="@+id/seekBar1"        android:layout_marginBottom="8dp">        <RadioButton            android:id="@+id/radio0"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:checked="true"            android:text="Blur" />        <RadioButton            android:id="@+id/radio1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"             android:layout_weight="1"            android:text="Emboss" />        <RadioButton            android:id="@+id/radio2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"             android:layout_weight="1"            android:text="Hue" />    </RadioGroup>    <SeekBar        android:id="@+id/seekBar1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="bottom"        android:layout_marginBottom="16dp" /></FrameLayout>

/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.os.Bundle;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.ImageView;import android.widget.RadioButton;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;import android.support.v8.renderscript.*;public class MainActivity extends Activity {    /* Number of bitmaps that is used for renderScript thread and UI thread synchronization.       Ideally, this can be reduced to 2, however in some devices, 2 buffers still showing tierings on UI.       Investigating a root cause.     */    private final int NUM_BITMAPS = 3;    private int mCurrentBitmap = 0;    private Bitmap mBitmapIn;    private Bitmap[] mBitmapsOut;    private ImageView mImageView;    private RenderScript mRS;    private Allocation mInAllocation;    private Allocation[] mOutAllocations;    private ScriptIntrinsicBlur mScriptBlur;    private ScriptIntrinsicConvolve5x5 mScriptConvolve;    private ScriptIntrinsicColorMatrix mScriptMatrix;    private final int MODE_BLUR = 0;    private final int MODE_CONVOLVE = 1;    private final int MODE_COLORMATRIX = 2;    private int mFilterMode = MODE_BLUR;    private RenderScriptTask mLatestTask = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main_layout);        /*         * Initialize UI         */        //Set up main image view        mBitmapIn = loadBitmap(R.drawable.data);        mBitmapsOut = new Bitmap[NUM_BITMAPS];        for (int i = 0; i < NUM_BITMAPS; ++i) {            mBitmapsOut[i] = Bitmap.createBitmap(mBitmapIn.getWidth(),                    mBitmapIn.getHeight(), mBitmapIn.getConfig());        }        mImageView = (ImageView) findViewById(R.id.imageView);        mImageView.setImageBitmap(mBitmapsOut[mCurrentBitmap]);        mCurrentBitmap += (mCurrentBitmap + 1) % NUM_BITMAPS;        //Set up seekbar        final SeekBar seekbar = (SeekBar) findViewById(R.id.seekBar1);        seekbar.setProgress(50);        seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {            public void onProgressChanged(SeekBar seekBar, int progress,                                          boolean fromUser) {                updateImage(progress);            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {            }        });        //Setup effect selector        RadioButton radio0 = (RadioButton) findViewById(R.id.radio0);        radio0.setOnCheckedChangeListener(new OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                if (isChecked) {                    mFilterMode = MODE_BLUR;                    updateImage(seekbar.getProgress());                }            }        });        RadioButton radio1 = (RadioButton) findViewById(R.id.radio1);        radio1.setOnCheckedChangeListener(new OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                if (isChecked) {                    mFilterMode = MODE_CONVOLVE;                    updateImage(seekbar.getProgress());                }            }        });        RadioButton radio2 = (RadioButton) findViewById(R.id.radio2);        radio2.setOnCheckedChangeListener(new OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                if (isChecked) {                    mFilterMode = MODE_COLORMATRIX;                    updateImage(seekbar.getProgress());                }            }        });        /*         * Create renderScript         */        createScript();        /*         * Create thumbnails         */       // createThumbnail();        /*         * Invoke renderScript kernel and update imageView         */        mFilterMode = MODE_BLUR;        updateImage(50);    }    private void createScript() {        mRS = RenderScript.create(this);        mInAllocation = Allocation.createFromBitmap(mRS, mBitmapIn);        mOutAllocations = new Allocation[NUM_BITMAPS];        for (int i = 0; i < NUM_BITMAPS; ++i) {            mOutAllocations[i] = Allocation.createFromBitmap(mRS, mBitmapsOut[i]);        }        /*        Create intrinsics.        RenderScript has built-in features such as blur, convolve filter etc.        These intrinsics are handy for specific operations without writing RenderScript kernel.        In the sample, it's creating blur, convolve and matrix intrinsics.         */        mScriptBlur = ScriptIntrinsicBlur.create(mRS, Element.U8_4(mRS));        mScriptConvolve = ScriptIntrinsicConvolve5x5.create(mRS,                Element.U8_4(mRS));        mScriptMatrix = ScriptIntrinsicColorMatrix.create(mRS,                Element.U8_4(mRS));    }    private void performFilter(Allocation inAllocation,                               Allocation outAllocation, Bitmap bitmapOut, float value) {        switch (mFilterMode) {            case MODE_BLUR:            /*             * Set blur kernel size             */                mScriptBlur.setRadius(value);            /*             * Invoke filter kernel             */                mScriptBlur.setInput(inAllocation);                mScriptBlur.forEach(outAllocation);                break;            case MODE_CONVOLVE: {                float f1 = value;                float f2 = 1.0f - f1;                // Emboss filter kernel                float coefficients[] = {-f1 * 2, 0, -f1, 0, 0, 0, -f2 * 2, -f2, 0,                        0, -f1, -f2, 1, f2, f1, 0, 0, f2, f2 * 2, 0, 0, 0, f1, 0,                        f1 * 2,};            /*             * Set kernel parameter             */                mScriptConvolve.setCoefficients(coefficients);            /*             * Invoke filter kernel             */                mScriptConvolve.setInput(inAllocation);                mScriptConvolve.forEach(outAllocation);                break;            }            case MODE_COLORMATRIX: {            /*             * Set HUE rotation matrix             * The matrix below performs a combined operation of,             * RGB->HSV transform * HUE rotation * HSV->RGB transform             */                float cos = (float) Math.cos((double) value);                float sin = (float) Math.sin((double) value);                Matrix3f mat = new Matrix3f();                mat.set(0, 0, (float) (.299 + .701 * cos + .168 * sin));                mat.set(1, 0, (float) (.587 - .587 * cos + .330 * sin));                mat.set(2, 0, (float) (.114 - .114 * cos - .497 * sin));                mat.set(0, 1, (float) (.299 - .299 * cos - .328 * sin));                mat.set(1, 1, (float) (.587 + .413 * cos + .035 * sin));                mat.set(2, 1, (float) (.114 - .114 * cos + .292 * sin));                mat.set(0, 2, (float) (.299 - .3 * cos + 1.25 * sin));                mat.set(1, 2, (float) (.587 - .588 * cos - 1.05 * sin));                mat.set(2, 2, (float) (.114 + .886 * cos - .203 * sin));                mScriptMatrix.setColorMatrix(mat);            /*             * Invoke filter kernel             */                mScriptMatrix.forEach(inAllocation, outAllocation);            }            break;        }        /*         * Copy to bitmap and invalidate image view         */        outAllocation.copyTo(bitmapOut);    }    /*    Convert seekBar progress parameter (0-100 in range) to parameter for each intrinsic filter.    (e.g. 1.0-25.0 in Blur filter)     */    private float getFilterParameter(int i) {        float f = 0.f;        switch (mFilterMode) {            case MODE_BLUR: {                final float max = 25.0f;                final float min = 1.f;                f = (float) ((max - min) * (i / 100.0) + min);            }            break;            case MODE_CONVOLVE: {                final float max = 2.f;                final float min = 0.f;                f = (float) ((max - min) * (i / 100.0) + min);            }            break;            case MODE_COLORMATRIX: {                final float max = (float) Math.PI;                final float min = (float) -Math.PI;                f = (float) ((max - min) * (i / 100.0) + min);            }            break;        }        return f;    }    /*     * In the AsyncTask, it invokes RenderScript intrinsics to do a filtering.     * After the filtering is done, an operation blocks at Allication.copyTo() in AsyncTask thread.     * Once all operation is finished at onPostExecute() in UI thread, it can invalidate and update ImageView UI.     */    private class RenderScriptTask extends AsyncTask<Float, Integer, Integer> {        Boolean issued = false;        protected Integer doInBackground(Float... values) {            int index = -1;            if (isCancelled() == false) {                issued = true;                index = mCurrentBitmap;                performFilter(mInAllocation, mOutAllocations[index], mBitmapsOut[index], values[0]);                mCurrentBitmap = (mCurrentBitmap + 1) % NUM_BITMAPS;            }            return index;        }        void updateView(Integer result) {            if (result != -1) {                // Request UI update                mImageView.setImageBitmap(mBitmapsOut[result]);                mImageView.invalidate();            }        }        protected void onPostExecute(Integer result) {            updateView(result);        }        protected void onCancelled(Integer result) {            if (issued) {                updateView(result);            }        }    }    /*    Invoke AsynchTask and cancel previous task.    When AsyncTasks are piled up (typically in slow device with heavy kernel),    Only the latest (and already started) task invokes RenderScript operation.     */    private void updateImage(int progress) {        float f = getFilterParameter(progress);        if (mLatestTask != null)            mLatestTask.cancel(false);        mLatestTask = new RenderScriptTask();        mLatestTask.execute(f);    }    /*    Helper to load Bitmap from resource     */    private Bitmap loadBitmap(int resource) {        final BitmapFactory.Options options = new BitmapFactory.Options();        options.inPreferredConfig = Bitmap.Config.ARGB_8888;        return BitmapFactory.decodeResource(getResources(), resource, options);    } }

效果图：

参考：http://possiblemobile.com/2013/10/renderscript-for-all/

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