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/*
* Copyright (C) 2008 ZXing authors
*
* 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.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.ImageView;
import android.widget.TextView;
/**
* This class encodes data from an Intent into a QR code, and then displays it full screen so that
* another person can scan it with their device.
*/
public final class EncodeActivity extends Activity {
private QRCodeEncoder mQRCodeEncoder;
private ProgressDialog mProgressDialog;
private boolean mFirstLayout;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Intent intent = getIntent();
if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION) ||
intent.getAction().equals(Intents.Encode.DEPRECATED_ACTION))) {
setContentView(R.layout.encode);
} else {
finish();
}
}
@Override
protected void onResume() {
super.onResume();
View layout = findViewById(R.id.encode_view);
layout.getViewTreeObserver().addOnGlobalLayoutListener(mLayoutListener);
mFirstLayout = true;
}
/**
* This needs to be delayed until after the first layout so that the view dimensions will be
* available.
*/
public final OnGlobalLayoutListener mLayoutListener = new OnGlobalLayoutListener() {
public void onGlobalLayout() {
if (mFirstLayout) {
View layout = findViewById(R.id.encode_view);
int width = layout.getWidth();
int height = layout.getHeight();
int smallerDimension = (width < height) ? width : height;
smallerDimension = smallerDimension * 7 / 8;
Intent intent = getIntent();
try {
mQRCodeEncoder = new QRCodeEncoder(EncodeActivity.this, intent);
setTitle(getString(R.string.app_name) + " - " + mQRCodeEncoder.getTitle());
mQRCodeEncoder.requestBarcode(mHandler, smallerDimension);
mProgressDialog = ProgressDialog.show(EncodeActivity.this, null,
getString(R.string.msg_encode_in_progress), true, true, mCancelListener);
} catch (IllegalArgumentException e) {
showErrorMessage(R.string.msg_encode_contents_failed);
}
mFirstLayout = false;
}
}
};
public final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message message) {
switch (message.what) {
case R.id.encode_succeeded:
mProgressDialog.dismiss();
mProgressDialog = null;
Bitmap image = (Bitmap) message.obj;
ImageView view = (ImageView) findViewById(R.id.image_view);
view.setImageBitmap(image);
TextView contents = (TextView) findViewById(R.id.contents_text_view);
contents.setText(mQRCodeEncoder.getDisplayContents());
mQRCodeEncoder = null;
break;
case R.id.encode_failed:
showErrorMessage(R.string.msg_encode_barcode_failed);
mQRCodeEncoder = null;
break;
}
}
};
private void showErrorMessage(int message) {
if (mProgressDialog != null) {
mProgressDialog.dismiss();
mProgressDialog = null;
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(message);
builder.setPositiveButton(R.string.button_ok, mClickListener);
builder.show();
}
private final OnClickListener mClickListener = new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
};
private final OnCancelListener mCancelListener = new OnCancelListener() {
public void onCancel(DialogInterface dialog) {
finish();
}
};
}
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