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Sync sample prebuilts for mnc-docs

Browse Source 
Synced to //developers/samples/android commit
7c1cbd61d1dea342322530bee4228d0d86bdeca1.

Change-Id: I682ebe15bb1d495866dbc8d43453cd7351aef5db
This commit is contained in:
Trevor Johns
2015-08-29 00:28:08 -07:00
parent fe105b4596
commit 8491f02e6e
6 changed files with 424 additions and 106 deletions
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173
samples/browseable/Camera2Basic/src/com.example.android.camera2basic/Camera2BasicFragment.java
View File

@@ -16,6 +16,7 @@
package com.example.android.camera2basic;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
@@ -23,6 +24,7 @@ import android.app.DialogFragment;
import android.app.Fragment;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.graphics.ImageFormat;
import android.graphics.Matrix;
@@ -43,7 +45,8 @@ import android.media.ImageReader;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.v13.app.FragmentCompat;
import android.util.Log;
import android.util.Size;
import android.util.SparseIntArray;
@@ -66,12 +69,15 @@ import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
public class Camera2BasicFragment extends Fragment implements View.OnClickListener {
public class Camera2BasicFragment extends Fragment
implements View.OnClickListener, FragmentCompat.OnRequestPermissionsResultCallback {
/**
* Conversion from screen rotation to JPEG orientation.
*/
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
private static final int REQUEST_CAMERA_PERMISSION = 1;
private static final String FRAGMENT_DIALOG = "dialog";
static {
ORIENTATIONS.append(Surface.ROTATION_0, 90);
@@ -94,14 +100,17 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
* Camera state: Waiting for the focus to be locked.
*/
private static final int STATE_WAITING_LOCK = 1;
/**
* Camera state: Waiting for the exposure to be precapture state.
*/
private static final int STATE_WAITING_PRECAPTURE = 2;
/**
* Camera state: Waiting for the exposure state to be something other than precapture.
*/
private static final int STATE_WAITING_NON_PRECAPTURE = 3;
/**
* Camera state: Picture was taken.
*/
@@ -148,17 +157,16 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
/**
* A {@link CameraCaptureSession } for camera preview.
*/
private CameraCaptureSession mCaptureSession;
/**
* A reference to the opened {@link CameraDevice}.
*/
private CameraDevice mCameraDevice;
/**
* The {@link android.util.Size} of camera preview.
*/
private Size mPreviewSize;
/**
@@ -167,7 +175,7 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice cameraDevice) {
public void onOpened(@NonNull CameraDevice cameraDevice) {
// This method is called when the camera is opened. We start camera preview here.
mCameraOpenCloseLock.release();
mCameraDevice = cameraDevice;
@@ -175,14 +183,14 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
@Override
public void onDisconnected(CameraDevice cameraDevice) {
public void onDisconnected(@NonNull CameraDevice cameraDevice) {
mCameraOpenCloseLock.release();
cameraDevice.close();
mCameraDevice = null;
}
@Override
public void onError(CameraDevice cameraDevice, int error) {
public void onError(@NonNull CameraDevice cameraDevice, int error) {
mCameraOpenCloseLock.release();
cameraDevice.close();
mCameraDevice = null;
@@ -303,43 +311,36 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
@Override
public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request,
CaptureResult partialResult) {
public void onCaptureProgressed(@NonNull CameraCaptureSession session,
@NonNull CaptureRequest request,
@NonNull CaptureResult partialResult) {
process(partialResult);
}
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
TotalCaptureResult result) {
public void onCaptureCompleted(@NonNull CameraCaptureSession session,
@NonNull CaptureRequest request,
@NonNull TotalCaptureResult result) {
process(result);
}
};
/**
* A {@link Handler} for showing {@link Toast}s.
*/
private Handler mMessageHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
Activity activity = getActivity();
if (activity != null) {
Toast.makeText(activity, (String) msg.obj, Toast.LENGTH_SHORT).show();
}
}
};
/**
* Shows a {@link Toast} on the UI thread.
*
* @param text The message to show
*/
private void showToast(String text) {
// We show a Toast by sending request message to mMessageHandler. This makes sure that the
// Toast is shown on the UI thread.
Message message = Message.obtain();
message.obj = text;
mMessageHandler.sendMessage(message);
private void showToast(final String text) {
final Activity activity = getActivity();
if (activity != null) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(activity, text, Toast.LENGTH_SHORT).show();
}
});
}
}
/**
@@ -355,7 +356,7 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
*/
private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
// Collect the supported resolutions that are at least as big as the preview Surface
List<Size> bigEnough = new ArrayList<Size>();
List<Size> bigEnough = new ArrayList<>();
int w = aspectRatio.getWidth();
int h = aspectRatio.getHeight();
for (Size option : choices) {
@@ -375,9 +376,7 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
public static Camera2BasicFragment newInstance() {
Camera2BasicFragment fragment = new Camera2BasicFragment();
fragment.setRetainInstance(true);
return fragment;
return new Camera2BasicFragment();
}
@Override
@@ -422,6 +421,28 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
super.onPause();
}
private void requestCameraPermission() {
if (FragmentCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
new ConfirmationDialog().show(getChildFragmentManager(), FRAGMENT_DIALOG);
} else {
FragmentCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},
REQUEST_CAMERA_PERMISSION);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == REQUEST_CAMERA_PERMISSION) {
if (grantResults.length != 1 || grantResults[0] != PackageManager.PERMISSION_GRANTED) {
ErrorDialog.newInstance(getString(R.string.request_permission))
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
/**
* Sets up member variables related to camera.
*
@@ -437,13 +458,16 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
= manager.getCameraCharacteristics(cameraId);
// We don't use a front facing camera in this sample.
if (characteristics.get(CameraCharacteristics.LENS_FACING)
== CameraCharacteristics.LENS_FACING_FRONT) {
Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
continue;
}
StreamConfigurationMap map = characteristics.get(
CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
if (map == null) {
continue;
}
// For still image captures, we use the largest available size.
Size largest = Collections.max(
@@ -478,7 +502,8 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
} catch (NullPointerException e) {
// Currently an NPE is thrown when the Camera2API is used but not supported on the
// device this code runs.
new ErrorDialog().show(getFragmentManager(), "dialog");
ErrorDialog.newInstance(getString(R.string.camera_error))
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
}
}
@@ -486,6 +511,11 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
* Opens the camera specified by {@link Camera2BasicFragment#mCameraId}.
*/
private void openCamera(int width, int height) {
if (getActivity().checkSelfPermission(Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
requestCameraPermission();
return;
}
setUpCameraOutputs(width, height);
configureTransform(width, height);
Activity activity = getActivity();
@@ -574,7 +604,7 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession cameraCaptureSession) {
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
// The camera is already closed
if (null == mCameraDevice) {
return;
@@ -600,7 +630,8 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
@Override
public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
public void onConfigureFailed(
@NonNull CameraCaptureSession cameraCaptureSession) {
showToast("Failed");
}
}, null
@@ -668,8 +699,8 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
/**
* Run the precapture sequence for capturing a still image. This method should be called when we
* get a response in {@link #mCaptureCallback} from {@link #lockFocus()}.
* Run the precapture sequence for capturing a still image. This method should be called when
* we get a response in {@link #mCaptureCallback} from {@link #lockFocus()}.
*/
private void runPrecaptureSequence() {
try {
@@ -714,9 +745,11 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
= new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
TotalCaptureResult result) {
public void onCaptureCompleted(@NonNull CameraCaptureSession session,
@NonNull CaptureRequest request,
@NonNull TotalCaptureResult result) {
showToast("Saved: " + mFile);
Log.d(TAG, mFile.toString());
unlockFocus();
}
};
@@ -729,11 +762,12 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
/**
* Unlock the focus. This method should be called when still image capture sequence is finished.
* Unlock the focus. This method should be called when still image capture sequence is
* finished.
*/
private void unlockFocus() {
try {
// Reset the autofucos trigger
// Reset the auto-focus trigger
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE,
@@ -827,13 +861,26 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
/**
* Shows an error message dialog.
*/
public static class ErrorDialog extends DialogFragment {
private static final String ARG_MESSAGE = "message";
public static ErrorDialog newInstance(String message) {
ErrorDialog dialog = new ErrorDialog();
Bundle args = new Bundle();
args.putString(ARG_MESSAGE, message);
dialog.setArguments(args);
return dialog;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Activity activity = getActivity();
return new AlertDialog.Builder(activity)
.setMessage("This device doesn't support Camera2 API.")
.setMessage(getArguments().getString(ARG_MESSAGE))
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
@@ -845,4 +892,36 @@ public class Camera2BasicFragment extends Fragment implements View.OnClickListen
}
/**
* Shows OK/Cancel confirmation dialog about camera permission.
*/
public static class ConfirmationDialog extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Fragment parent = getParentFragment();
return new AlertDialog.Builder(getActivity())
.setMessage(R.string.request_permission)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
FragmentCompat.requestPermissions(parent,
new String[]{Manifest.permission.CAMERA},
REQUEST_CAMERA_PERMISSION);
}
})
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Activity activity = parent.getActivity();
if (activity != null) {
activity.finish();
}
}
})
.create();
}
}
}