嗨，我正在制作照片效果应用程序。所以，我从相机加载位图（我保存了原始图像，然后加载）到 glsurfaceview 并应用了一些效果，但我找不到将更改的图像保存为图像文件 *.png 或 *.jpg 的方法。
我几乎到处都看过，但它们对我的应用程序不可用..当我尝试保存时总是强制关闭。
这是我的代码。
我找到了一些保存代码，但我找不到工作。
主要的.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<android.opengl.GLSurfaceView
android:id="@+id/effectsview"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="0.05" />
<GridLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</GridLayout>
<GridLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:columnCount="1" >
<Button
android:id="@+id/button1"
android:layout_width="159dp"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
android:onClick="saverenderedimage"
android:layout_gravity="left|top"
android:text="Save Image" />
<Button
android:id="@+id/Button01"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left|top"
android:onClick="gomain"
android:text="Go Main Menu without saving" />
<Button
android:id="@+id/button2"
android:layout_width="156dp"
android:layout_column="0"
android:layout_gravity="right|top"
android:layout_row="0"
android:onClick="sharedialog"
android:text="Share" />
</GridLayout>
</LinearLayout>
效果选择器和应用程序.java
public class Effects_selevtor extends Activity implements GLSurfaceView.Renderer {
i declared some strings ints (deleted)
String imagefilepath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/filename.jpg";
int mCurrentEffect;
public void setCurrentEffect(int effect) {
mCurrentEffect = effect;
}
public void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_effects_selevtor);
mEffectView = (GLSurfaceView) findViewById(R.id.effectsview);
mEffectView.setEGLContextClientVersion(2);
mEffectView.setRenderer(this);
mEffectView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
mCurrentEffect = R.id.none;
Uri imageFileUri = Uri.parse("file:///sdcard/filename.jpg");
Intent cameraIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageFileUri);
startActivityForResult(cameraIntent, 2);
}
public void gomain(View View) {
startActivity(new Intent(Effects_selevtor.this,HelloEffects.class));
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 2) {
try {
if (bitmap != null) {
bitmap.recycle();
}
GLES20.glGenTextures(2, mTextures, 0);
// Load input bitmap
Bitmap bitmap = BitmapFactory.decodeFile(imagefilepath);
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();
Toast.makeText(getApplicationContext(), "Touch your phone's Menu button to select effects ", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public static Bitmap SavePixels(int x, int y, int w, int h, GL10 gl)
{
int b[]=new int[w*(y+h)];
int bt[]=new int[w*h];
IntBuffer ib=IntBuffer.wrap(b);
ib.position(0);
gl.glReadPixels(x, 0, w, y+h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, ib);
for(int i=0, k=0; i<h; i++, k++)
{//remember, that OpenGL bitmap is incompatible with Android bitmap
//and so, some correction need.
for(int j=0; j<w; j++)
{
int pix=b[i*w+j];
int pb=(pix>>16)&0xff;
int pr=(pix<<16)&0x00ff0000;
int pix1=(pix&0xff00ff00) | pr | pb;
bt[(h-k-1)*w+j]=pix1;
}
}
Bitmap sb=Bitmap.createBitmap(bt, w, h, Bitmap.Config.ARGB_8888);
return sb;
}
public static void SavePNG(int x, int y, int w, int h, String name, GL10 gl)
{
Bitmap bmp=SavePixels(x,y,w,h,gl);
try
{
FileOutputStream fos=new FileOutputStream("/sdcard/CamWay/"+name);
bmp.compress(CompressFormat.PNG, 100, fos);
try
{
fos.flush();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
try
{
fos.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void saverenderedimage(View view) {
//i tried save but it not worked i don't understand what should i declare for "gl"
SavePNG(0, 0,mEffectView.getWidth() , mEffectView.getHeight(), "CamWay.png", gl);
// SavePNG(0, 0,mEffectView.getWidth() , mEffectView.getHeight(), imagefilepath, gl);
startActivity(new Intent(Effects_selevtor.this,HelloEffects.class));
}
public void OnClickselector(View arg0) {
startActivity(new Intent(Effects_selevtor.this,HelloEffects.class));
}
private void loadTextures() {
// Generate textures
GLES20.glGenTextures(2, mTextures, 0);
// Load input bitmap
Bitmap bitmap = BitmapFactory.decodeFile(imagefilepath);
// Load input bitmap
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();
}
/**
* Initialize the correct effect based on the selected menu/action item
*/
switch (mCurrentEffect) {
case R.id.none:
break;
case R.id.vignette:
mEffect = effectFactory.createEffect(
EffectFactory.EFFECT_VIGNETTE);
mEffect.setParameter("scale", .5f);
break;
//and a lot effect more i deleted for readability
default:
break;
}
}
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);
}
}