之前是试用EasyAR来帮开发一些简单的demo。后来弄出来以后，去香港参加完展览会之后。回来提出了新的需求，能不能添加按钮拍照。然后我想不是很简单嘛。然后当我添加完以后，截图。boom！发现整个图片都是黑色的。
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.media.MediaPlayer;
import android.net.Uri;
import android.opengl.GLES20;
import android.opengl.GLSurfaceView;
import android.os.Environment;
import android.os.Handler;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.IntBuffer;
import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLContext;
import javax.microedition.khronos.egl.EGLDisplay;
import javax.microedition.khronos.opengles.GL10;
import cn.easyar.Engine;
public class GLView extends GLSurfaceView {
private HelloAR helloAR;
boolean shouldTakePic = false;
private int surfaceWidth;
private int surfaceHeight;
private Activity activity;
public void setShouldTakePic(boolean shouldTakePic) {
this.shouldTakePic = shouldTakePic;
}
public GLView(Context context,Activity mActivity) {
super(context);
activity=mActivity;
setEGLContextFactory(new ContextFactory());
setEGLConfigChooser(new ConfigChooser());
helloAR = new HelloAR();
this.setRenderer(new Renderer() {
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
synchronized (helloAR) {
helloAR.initGL();
}
}
@Override
public void onSurfaceChanged(GL10 gl, int w, int h) {
synchronized (helloAR) {
helloAR.resizeGL(w, h);
surfaceWidth = w;
surfaceHeight = h;
}
}
@Override
public void onDrawFrame(GL10 gl) {
synchronized (helloAR) {
helloAR.render();
try {
if (shouldTakePic) {
shouldTakePic = false;
int w = surfaceWidth;
int h = surfaceHeight;
int b[] = new int[(int) (w * h)];
int bt[] = new int[(int) (w * h)];
IntBuffer buffer = IntBuffer.wrap(b);
buffer.position(0);
GLES20.glReadPixels(0, 0, w, h, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buffer);
for (int i = 0; i < h; i++) {
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 - i - 1) * w + j] = pix1;
}
}
Bitmap inBitmap = null;
if (inBitmap == null || !inBitmap.isMutable() || inBitmap.getWidth() != w || inBitmap.getHeight() != h) {
inBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
}
inBitmap.copyPixelsFromBuffer(buffer);
inBitmap = Bitmap.createBitmap(bt, w, h, Bitmap.Config.ARGB_8888);
saveBitmap(inBitmap,activity);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
this.setZOrderMediaOverlay(true);
}
public void saveBitmap(Bitmap bmp,Activity context) {
//首先保存图片
File appDir = new File(Environment.getExternalStorageDirectory(), "VisualSonic");
if (!appDir.exists()) {
appDir.mkdir();
}
String fileName = System.currentTimeMillis() + ".jpg";
File file = new File(appDir, fileName);
try {
FileOutputStream fos = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 其次把文件插入到系统图库
try {
MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), fileName, null);
context.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity, "保存照片成功", Toast.LENGTH_SHORT).show();
}
});
} catch (FileNotFoundException e) {
e.printStackTrace();
context.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity, "保存失败", Toast.LENGTH_SHORT).show();
}
});
}
// 最后通知图库更新
context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + file)));
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
synchronized (helloAR) {
if (helloAR.initialize()) {
helloAR.start();
}
}
}
@Override
protected void onDetachedFromWindow() {
synchronized (helloAR) {
helloAR.stop();
helloAR.dispose();
}
super.onDetachedFromWindow();
}
@Override
public void onResume() {
super.onResume();
Engine.onResume();
}
@Override
public void onPause() {
Engine.onPause();
super.onPause();
}
private static class ContextFactory implements EGLContextFactory
{
private static int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
@Override
public EGLContext createContext(EGL10 egl, EGLDisplay display, EGLConfig eglConfig)
{
EGLContext context;
int[] attrib = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib );
return context;
}
@Override
public void destroyContext(EGL10 egl, EGLDisplay display, EGLContext context)
{
egl.eglDestroyContext(display, context);
}
}
private static class ConfigChooser implements EGLConfigChooser
{
@Override
public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display)
{
final int EGL_OPENGL_ES2_BIT = 0x0004;
final int[] attrib = { EGL10.EGL_RED_SIZE, 4, EGL10.EGL_GREEN_SIZE, 4, EGL10.EGL_BLUE_SIZE, 4,
EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL10.EGL_NONE };
int[] num_config = new int[1];
egl.eglChooseConfig(display, attrib, null, 0, num_config);
int numConfigs = num_config[0];
if (numConfigs <= 0)
throw new IllegalArgumentException("fail to choose EGL configs");
EGLConfig[] configs = new EGLConfig[numConfigs];
egl.eglChooseConfig(display, attrib, configs, numConfigs,
num_config);
for (EGLConfig config : configs)
{
int[] val = new int[1];
int r = 0, g = 0, b = 0, a = 0, d = 0;
if (egl.eglGetConfigAttrib(display, config, EGL10.EGL_DEPTH_SIZE, val))
d = val[0];
if (d < 16)
continue;
if (egl.eglGetConfigAttrib(display, config, EGL10.EGL_RED_SIZE, val))
r = val[0];
if (egl.eglGetConfigAttrib(display, config, EGL10.EGL_GREEN_SIZE, val))
g = val[0];
if (egl.eglGetConfigAttrib(display, config, EGL10.EGL_BLUE_SIZE, val))
b = val[0];
if (egl.eglGetConfigAttrib(display, config, EGL10.EGL_ALPHA_SIZE, val))
a = val[0];
if (r == 8 && g == 8 && b == 8 && a == 0)
return config;
}
return configs[0];
}
}
}
然后只需在activity调用即可
glView = new GLView(this,MainActivity.this);
glView.setShouldTakePic(true);
参考资料
- http://www.it1352.com/100471.html
- https://blog.csdn.net/TuGeLe/article/details/79199161
- https://blog.csdn.net/junzia/article/details/73717506
- http://hounychang.github.io/2015/05/13/%E5%AF%B9GLSurfaceView%E6%88%AA%E5%9B%BE/