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/*
* Copyright (C) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.client.android;
import android.app.Activity;
import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.Window;
import android.view.WindowManager.LayoutParams;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.result.ParsedReaderResult;
import com.google.zxing.client.result.ParsedReaderResultType;
/**
* The barcode reader activity itself. This is loosely based on the CameraPreview
* example included in the Android SDK.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author Android Team (for CameraPreview example)
*/
public final class BarcodeReaderCaptureActivity extends Activity {
private CameraManager cameraManager;
private CameraSurfaceView surfaceView;
private WorkerThread workerThread;
private static final int ABOUT_ID = Menu.FIRST;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
requestWindowFeature(Window.FEATURE_NO_TITLE);
// Make sure to create a TRANSLUCENT window. This is required for SurfaceView to work.
// Eventually this'll be done by the system automatically.
getWindow().setAttributes(new LayoutParams(LayoutParams.APPLICATION_TYPE,
LayoutParams.NO_STATUS_BAR_FLAG));
getWindow().setFormat(PixelFormat.TRANSLUCENT);
cameraManager = new CameraManager(getApplication());
surfaceView = new CameraSurfaceView(getApplication(), cameraManager);
setContentView(surfaceView);
workerThread = new WorkerThread(surfaceView, cameraManager, messageHandler);
workerThread.requestPreviewLoop();
workerThread.start();
}
@Override
protected boolean isFullscreenOpaque() {
// Our main window is set to translucent, but we know that we will
// fill it with opaque data. Tell the system that so it can perform
// some important optimizations.
return true;
}
@Override
protected void onResume() {
super.onResume();
cameraManager.openDriver();
if (workerThread == null) {
workerThread = new WorkerThread(surfaceView, cameraManager, messageHandler);
workerThread.requestPreviewLoop();
workerThread.start();
}
}
@Override
protected void onPause() {
super.onPause();
if (workerThread != null) {
workerThread.requestExitAndWait();
workerThread = null;
}
cameraManager.closeDriver();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
workerThread.requestStillAndDecode();
return true;
} else {
return super.onKeyDown(keyCode, event);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, ABOUT_ID, R.string.menu_about);
return true;
}
@Override
public boolean onOptionsItemSelected(Menu.Item item) {
switch (item.getId()) {
case ABOUT_ID:
Context context = getApplication();
showAlert(context.getString(R.string.title_about),
context.getString(R.string.msg_about),
context.getString(R.string.button_ok), null, true, null);
break;
}
return super.onOptionsItemSelected(item);
}
Handler messageHandler = new Handler() {
@Override
public void handleMessage(Message message) {
switch (message.what) {
case R.id.decoding_succeeded_message:
handleDecode((Result)message.obj);
break;
case R.id.decoding_failed_message:
Context context = getApplication();
showAlert(context.getString(R.string.title_no_barcode_detected),
context.getString(R.string.msg_no_barcode_detected),
context.getString(R.string.button_ok), null, true, null);
break;
}
}
};
public void restartPreview() {
workerThread.requestPreviewLoop();
}
// TODO(dswitkin): These deprecated showAlert calls need to be updated.
private void handleDecode(Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
surfaceView.drawResultPoints(points);
}
Context context = getApplication();
ParsedReaderResult readerResult = ParsedReaderResult.parseReaderResult(rawResult.getText());
Handler handler = new ResultHandler(this, readerResult);
if (canBeHandled(readerResult.getType())) {
// Can be handled by some external app; ask if the user wants to
// proceed first though
Message yesMessage = handler.obtainMessage(R.string.button_yes);
Message noMessage = handler.obtainMessage(R.string.button_no);
showAlert(context.getString(getDialogTitleID(readerResult.getType())),
readerResult.getDisplayResult(), context.getString(R.string.button_yes),
yesMessage, context.getString(R.string.button_no), noMessage, true, noMessage);
} else {
// Just show information to user
Message okMessage = handler.obtainMessage(R.string.button_ok);
showAlert(context.getString(R.string.title_barcode_detected),
readerResult.getDisplayResult(), context.getString(R.string.button_ok), okMessage, null,
null, true, okMessage);
}
}
private static boolean canBeHandled(ParsedReaderResultType type) {
return type != ParsedReaderResultType.TEXT;
}
private static int getDialogTitleID(ParsedReaderResultType type) {
if (type == ParsedReaderResultType.ADDRESSBOOK) {
return R.string.title_add_contact;
} else if (type == ParsedReaderResultType.BOOKMARK) {
return R.string.title_open_url;
} else if (type == ParsedReaderResultType.EMAIL || type == ParsedReaderResultType.EMAIL_ADDRESS) {
return R.string.title_compose_email;
} else if (type == ParsedReaderResultType.UPC) {
return R.string.title_lookup_barcode;
} else if (type == ParsedReaderResultType.URI) {
return R.string.title_open_url;
} else {
return R.string.title_barcode_detected;
}
}
}
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