如何在应用mediaeffects后将位图图像保存到手机内存？

Question

我尝试将mediaeffects应用到我的位图图像对象并且已成功应用但现在我想在将效果应用到图像后保存图像。怎么做 ？我也提到了其他问题，但无法得到适当的答案。

以下是代码

public class HelloEffects extends Activity implements GLSurfaceView.Renderer {

    private GLSurfaceView mEffectView;
    private int[] mTextures = new int[2];
    private EffectContext mEffectContext;
    private Effect mEffect;
    private TextureRenderer mTexRenderer = new TextureRenderer();
    private int mImageWidth;
    private int mImageHeight;
    private boolean mInitialized = false;
    int mCurrentEffect;
    final Context context = this;

    public void setCurrentEffect(int effect) {
        mCurrentEffect = effect;
    }



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);




        mEffectView = (GLSurfaceView) findViewById(R.id.effectsview);
        mEffectView.setEGLContextClientVersion(2);
        mEffectView.setRenderer(this);
        mEffectView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
        mCurrentEffect = R.id.autofix;
    }

    private void loadTextures() {
        // Generate textures
        GLES20.glGenTextures(2, mTextures, 0);

        // Load input bitmap
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
                R.drawable.puppy);
        mImageWidth = bitmap.getWidth();
        mImageHeight = bitmap.getHeight();
        mTexRenderer.updateTextureSize(mImageWidth, mImageHeight);

        // Upload to texture
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextures[0]);
        GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);

        // Set texture parameters
        GLToolbox.initTexParams();
    }

    private void initEffect() {
        EffectFactory effectFactory = mEffectContext.getFactory();
        if (mEffect != null) {
            mEffect.release();
        }

        mEffect = effectFactory.createEffect(
                EffectFactory.EFFECT_AUTOFIX);
        mEffect.setParameter("scale", 0.5f);

    }

    private void applyEffect() {
        mEffect.apply(mTextures[0], mImageWidth, mImageHeight, mTextures[1]);
    }

    private void renderResult() {
        if (mCurrentEffect != R.id.none) {
            // if no effect is chosen, just render the original bitmap
            mTexRenderer.renderTexture(mTextures[1]);
        }
        else {
            // render the result of applyEffect()
            mTexRenderer.renderTexture(mTextures[0]);
        }
    }

    @Override
    public void onDrawFrame(GL10 gl) {
        if (!mInitialized) {
            //Only need to do this once
            mEffectContext = EffectContext.createWithCurrentGlContext();
            mTexRenderer.init();
            loadTextures();
            mInitialized = true;
        }
        if (mCurrentEffect != R.id.none) {
            //if an effect is chosen initialize it and apply it to the texture
            initEffect();
            applyEffect();
        }
        renderResult();
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {
        if (mTexRenderer != null) {
            mTexRenderer.updateViewSize(width, height);
        }
    }

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
    }