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Fix Andoid samples: black screen after resume problem

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This commit is contained in:
Andrey Kamaev
2012-08-22 21:14:06 +04:00
parent 71df8906be
commit 285af48040
32 changed files with 1225 additions and 1339 deletions
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143
samples/android/tutorial-3-native/src/org/opencv/samples/tutorial3/Sample3Native.java
View File

@@ -10,91 +10,86 @@ import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.view.WindowManager;
public class Sample3Native extends Activity {
private static final String TAG = "Sample::Activity";
private Sample3View mView;
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
System.loadLibrary("native_sample");
// Create and set View
mView = new Sample3View(mAppContext);
setContentView(mView);
// Check native OpenCV camera
if( !mView.openCamera() ) {
AlertDialog ad = new AlertDialog.Builder(mAppContext).create();
ad.setCancelable(false); // This blocks the 'BACK' button
ad.setMessage("Fatal error: can't open camera!");
ad.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
ad.show();
}
} break;
/** OpenCV loader cannot start Google Play **/
case LoaderCallbackInterface.MARKET_ERROR:
{
Log.d(TAG, "Google Play service is not accessible!");
AlertDialog MarketErrorMessage = new AlertDialog.Builder(mAppContext).create();
MarketErrorMessage.setTitle("OpenCV Manager");
MarketErrorMessage.setMessage("Google Play service is not accessible!\nTry to install the 'OpenCV Manager' and the appropriate 'OpenCV binary pack' APKs from OpenCV SDK manually via 'adb install' command.");
MarketErrorMessage.setCancelable(false); // This blocks the 'BACK' button
MarketErrorMessage.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
mAppContext.finish();
}
});
MarketErrorMessage.show();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
System.loadLibrary("native_sample");
// Create and set View
mView = new Sample3View(mAppContext);
setContentView(mView);
// Check native OpenCV camera
if( !mView.openCamera() ) {
AlertDialog ad = new AlertDialog.Builder(mAppContext).create();
ad.setCancelable(false); // This blocks the 'BACK' button
ad.setMessage("Fatal error: can't open camera!");
ad.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
ad.show();
}
} break;
/** OpenCV loader cannot start Google Play **/
case LoaderCallbackInterface.MARKET_ERROR:
{
Log.d(TAG, "Google Play service is not accessible!");
AlertDialog MarketErrorMessage = new AlertDialog.Builder(mAppContext).create();
MarketErrorMessage.setTitle("OpenCV Manager");
MarketErrorMessage.setMessage("Google Play service is not accessible!\nTry to install the 'OpenCV Manager' and the appropriate 'OpenCV binary pack' APKs from OpenCV SDK manually via 'adb install' command.");
MarketErrorMessage.setCancelable(false); // This blocks the 'BACK' button
MarketErrorMessage.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
mAppContext.finish();
}
});
MarketErrorMessage.show();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public Sample3Native() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
@Override
protected void onPause() {
protected void onPause() {
Log.i(TAG, "onPause");
super.onPause();
if (null != mView)
mView.releaseCamera();
}
if (null != mView)
mView.releaseCamera();
super.onPause();
}
@Override
protected void onResume() {
@Override
protected void onResume() {
Log.i(TAG, "onResume");
super.onResume();
if((null != mView) && !mView.openCamera() ) {
AlertDialog ad = new AlertDialog.Builder(this).create();
ad.setCancelable(false); // This blocks the 'BACK' button
ad.setMessage("Fatal error: can't open camera!");
ad.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
ad.show();
}
}
super.onResume();
Log.i(TAG, "Trying to load OpenCV library");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mOpenCVCallBack))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
}
/** Called when the activity is first created. */
@Override
@@ -102,10 +97,6 @@ public class Sample3Native extends Activity {
Log.i(TAG, "onCreate");
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mOpenCVCallBack))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
}

38
samples/android/tutorial-3-native/src/org/opencv/samples/tutorial3/Sample3View.java
View File

@@ -4,30 +4,30 @@ import android.content.Context;
import android.graphics.Bitmap;
class Sample3View extends SampleViewBase {
private int mFrameSize;
private Bitmap mBitmap;
private int[] mRGBA;
private int mFrameSize;
private Bitmap mBitmap;
private int[] mRGBA;
public Sample3View(Context context) {
super(context);
}
@Override
protected void onPreviewStarted(int previewWidtd, int previewHeight) {
mFrameSize = previewWidtd * previewHeight;
mRGBA = new int[mFrameSize];
mBitmap = Bitmap.createBitmap(previewWidtd, previewHeight, Bitmap.Config.ARGB_8888);
}
@Override
protected void onPreviewStarted(int previewWidtd, int previewHeight) {
mFrameSize = previewWidtd * previewHeight;
mRGBA = new int[mFrameSize];
mBitmap = Bitmap.createBitmap(previewWidtd, previewHeight, Bitmap.Config.ARGB_8888);
}
@Override
protected void onPreviewStopped() {
if(mBitmap != null) {
mBitmap.recycle();
mBitmap = null;
}
mRGBA = null;
}
@Override
protected void onPreviewStopped() {
if(mBitmap != null) {
mBitmap.recycle();
mBitmap = null;
}
mRGBA = null;
}
@Override
protected Bitmap processFrame(byte[] data) {
@@ -35,7 +35,7 @@ class Sample3View extends SampleViewBase {
FindFeatures(getFrameWidth(), getFrameHeight(), data, rgba);
Bitmap bmp = mBitmap;
Bitmap bmp = mBitmap;
bmp.setPixels(rgba, 0/* offset */, getFrameWidth() /* stride */, 0, 0, getFrameWidth(), getFrameHeight());
return bmp;
}

38
samples/android/tutorial-3-native/src/org/opencv/samples/tutorial3/SampleViewBase.java
View File

@@ -45,35 +45,35 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
mCamera.setPreviewTexture( new SurfaceTexture(10) );
else
mCamera.setPreviewDisplay(null);
}
mCamera.setPreviewDisplay(null);
}
public boolean openCamera() {
Log.i(TAG, "openCamera");
releaseCamera();
mCamera = Camera.open();
if(mCamera == null) {
Log.e(TAG, "Can't open camera!");
return false;
Log.e(TAG, "Can't open camera!");
return false;
}
mCamera.setPreviewCallbackWithBuffer(new PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera camera) {
synchronized (SampleViewBase.this) {
System.arraycopy(data, 0, mFrame, 0, data.length);
SampleViewBase.this.notify();
SampleViewBase.this.notify();
}
camera.addCallbackBuffer(mBuffer);
}
});
return true;
}
public void releaseCamera() {
Log.i(TAG, "releaseCamera");
mThreadRun = false;
synchronized (this) {
if (mCamera != null) {
if (mCamera != null) {
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
@@ -82,7 +82,7 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde
}
onPreviewStopped();
}
public void setupCamera(int width, int height) {
Log.i(TAG, "setupCamera");
synchronized (this) {
@@ -105,15 +105,15 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde
}
params.setPreviewSize(getFrameWidth(), getFrameHeight());
List<String> FocusModes = params.getSupportedFocusModes();
if (FocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO))
{
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
}
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
}
mCamera.setParameters(params);
/* Now allocate the buffer */
params = mCamera.getParameters();
int size = params.getPreviewSize().width * params.getPreviewSize().height;
@@ -123,11 +123,11 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde
mFrame = new byte [size];
mCamera.addCallbackBuffer(mBuffer);
try {
setPreview();
} catch (IOException e) {
Log.e(TAG, "mCamera.setPreviewDisplay/setPreviewTexture fails: " + e);
}
try {
setPreview();
} catch (IOException e) {
Log.e(TAG, "mCamera.setPreviewDisplay/setPreviewTexture fails: " + e);
}
/* Notify that the preview is about to be started and deliver preview size */
onPreviewStarted(params.getPreviewSize().width, params.getPreviewSize().height);
@@ -137,7 +137,7 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde
}
}
}
public void surfaceChanged(SurfaceHolder _holder, int format, int width, int height) {
Log.i(TAG, "surfaceChanged");
setupCamera(width, height);