/*
* Copyright(c) 2017 lizhaotailang
*
* 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 io.github.marktony.espresso.zxing;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import com.google.zxing.Result;
import io.github.marktony.espresso.R;
import io.github.marktony.espresso.zxing.camera.CameraManager;
import io.github.marktony.espresso.zxing.decode.DecodeThread;
import io.github.marktony.espresso.zxing.utils.BeepManager;
import io.github.marktony.espresso.zxing.utils.CaptureActivityHandler;
import io.github.marktony.espresso.zxing.utils.InactivityTimer;
import java.io.IOException;
import java.lang.reflect.Field;
/**
* Created by lizhaotailang on 2017/2/13.
*/
public class CaptureActivity extends AppCompatActivity
implements SurfaceHolder.Callback {
private static final String TAG = CaptureActivity.class.getSimpleName();
private CameraManager cameraManager;
private CaptureActivityHandler handler;
private InactivityTimer inactivityTimer;
private BeepManager beepManager;
private SurfaceView scanPreview = null;
private RelativeLayout scanContainer;
private RelativeLayout scanCropView;
private ImageView scanLine;
private Rect mCropRect = null;
public Handler getHandler() {
return handler;
}
public CameraManager getCameraManager() {
return cameraManager;
}
private boolean isHasSurface = false;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_scan);
scanPreview = (SurfaceView) findViewById(R.id.capture_preview);
scanContainer = (RelativeLayout) findViewById(R.id.capture_container);
scanCropView = (RelativeLayout) findViewById(R.id.capture_crop_view);
scanLine = (ImageView) findViewById(R.id.capture_scan_line);
inactivityTimer = new InactivityTimer(this);
beepManager = new BeepManager(this);
TranslateAnimation animation = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.9f);
animation.setDuration(4500);
animation.setRepeatCount(-1);
animation.setRepeatMode(Animation.RESTART);
scanLine.startAnimation(animation);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
protected void onResume() {
super.onResume();
// CameraManager must be initialized here, not in onCreate(). This is
// necessary because we don't
// want to open the camera driver and measure the screen size if we're
// going to show the help on
// first launch. That led to bugs where the scanning rectangle was the
// wrong size and partially
// off screen.
cameraManager = new CameraManager(getApplication());
handler = null;
if (isHasSurface) {
// The activity was paused but not stopped, so the surface still
// exists. Therefore
// surfaceCreated() won't be called, so init the camera here.
initCamera(scanPreview.getHolder());
} else {
// Install the callback and wait for surfaceCreated() to init the
// camera.
scanPreview.getHolder().addCallback(this);
}
inactivityTimer.onResume();
}
@Override
protected void onPause() {
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
inactivityTimer.onPause();
beepManager.close();
cameraManager.closeDriver();
if (!isHasSurface) {
scanPreview.getHolder().removeCallback(this);
}
super.onPause();
}
@Override
protected void onDestroy() {
inactivityTimer.shutdown();
super.onDestroy();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
onBackPressed();
}
return true;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (holder == null) {
Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
}
if (!isHasSurface) {
isHasSurface = true;
initCamera(holder);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
isHasSurface = false;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
/**
* A valid barcode has been found, so give an indication of success and show
* the results.
*
* @param rawResult The contents of the barcode.
* @param bundle The extras
*/
public void handleDecode(Result rawResult, Bundle bundle) {
inactivityTimer.onActivity();
beepManager.playBeepSoundAndVibrate();
Intent resultIntent = new Intent();
bundle.putInt("width", mCropRect.width());
bundle.putInt("height", mCropRect.height());
bundle.putString("result", rawResult.getText());
resultIntent.putExtras(bundle);
this.setResult(RESULT_OK,resultIntent);
this.finish();
}
/**
* Init the camera.
* @param surfaceHolder The surface holder.
*/
private void initCamera(SurfaceHolder surfaceHolder) {
if (surfaceHolder == null) {
throw new IllegalStateException("No SurfaceHolder provided");
}
if (cameraManager.isOpen()) {
Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
return;
}
try {
cameraManager.openDriver(surfaceHolder);
// Creating the handler starts the preview, which can also throw a
// RuntimeException.
if (handler == null) {
handler = new CaptureActivityHandler(this, cameraManager, DecodeThread.ALL_MODE);
}
initCrop();
} catch (IOException ioe) {
Log.w(TAG, ioe);
displayFrameworkBugMessageAndExit();
} catch (RuntimeException e) {
// Barcode Scanner has seen crashes in the wild of this variety:
// java.?lang.?RuntimeException: Fail to connect to camera service
Log.w(TAG, "Unexpected error initializing camera", e);
displayFrameworkBugMessageAndExit();
}
}
private void displayFrameworkBugMessageAndExit() {
// camera error
AlertDialog dialog = new AlertDialog.Builder(this).create();
dialog.setMessage(getString(R.string.unable_to_open_camera));
dialog.setTitle(getString(R.string.error));
dialog.setButton(DialogInterface.BUTTON_POSITIVE, getString(android.R.string.ok), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.setButton(DialogInterface.BUTTON_NEGATIVE, getString(android.R.string.cancel), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.show();
}
public void restartPreviewAfterDelay(long delayMS) {
if (handler != null) {
handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
}
}
public Rect getCropRect() {
return mCropRect;
}
/**
* Init the interception rectangle area
*/
private void initCrop() {
int cameraWidth = cameraManager.getCameraResolution().y;
int cameraHeight = cameraManager.getCameraResolution().x;
// Obtain the location information of the scanning frame in layout
int[] location = new int[2];
scanCropView.getLocationInWindow(location);
int cropLeft = location[0];
int cropTop = location[1] - getStatusBarHeight();
int cropWidth = scanCropView.getWidth();
int cropHeight = scanCropView.getHeight();
// Obtain the height and width of layout container.
int containerWidth = scanContainer.getWidth();
int containerHeight = scanContainer.getHeight();
// Compute the coordinate of the top-left vertex x
// of the final interception rectangle.
int x = cropLeft * cameraWidth / containerWidth;
// Compute the coordinate of the top-left vertex y
// of the final interception rectangle.
int y = cropTop * cameraHeight / containerHeight;
// Compute the width of the final interception rectangle.
int width = cropWidth * cameraWidth / containerWidth;
// Compute the height of the final interception rectangle.
int height = cropHeight * cameraHeight / containerHeight;
// Generate the final interception rectangle.
mCropRect = new Rect(x, y, width + x, height + y);
}
private int getStatusBarHeight() {
try {
Class<?> c = Class.forName("com.android.internal.R$dimen");
Object obj = c.newInstance();
Field field = c.getField("status_bar_height");
int x = Integer.parseInt(field.get(obj).toString());
return getResources().getDimensionPixelSize(x);
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
}