2 * Copyright (C) 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.client.android;
19 import android.app.Activity;
20 import android.app.AlertDialog;
21 import android.app.ProgressDialog;
22 import android.content.DialogInterface;
23 import android.content.DialogInterface.OnCancelListener;
24 import android.content.DialogInterface.OnClickListener;
25 import android.content.Intent;
26 import android.graphics.Bitmap;
27 import android.os.Bundle;
28 import android.os.Handler;
29 import android.os.Message;
30 import android.view.View;
31 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
32 import android.widget.ImageView;
33 import android.widget.TextView;
36 * This class encodes data from an Intent into a QR code, and then displays it full screen so that
37 * another person can scan it with their device.
39 * @author dswitkin@google.com (Daniel Switkin)
41 public final class EncodeActivity extends Activity {
42 private QRCodeEncoder qrCodeEncoder;
43 private ProgressDialog progressDialog;
44 private boolean firstLayout;
47 * This needs to be delayed until after the first layout so that the view dimensions will be
50 public final OnGlobalLayoutListener layoutListener = new OnGlobalLayoutListener() {
51 public void onGlobalLayout() {
53 View layout = findViewById(R.id.encode_view);
54 int width = layout.getWidth();
55 int height = layout.getHeight();
56 int smallerDimension = width < height ? width : height;
57 smallerDimension = smallerDimension * 7 / 8;
59 Intent intent = getIntent();
61 qrCodeEncoder = new QRCodeEncoder(EncodeActivity.this, intent);
62 setTitle(getString(R.string.app_name) + " - " + qrCodeEncoder.getTitle());
63 qrCodeEncoder.requestBarcode(handler, smallerDimension);
64 progressDialog = ProgressDialog.show(EncodeActivity.this, null,
65 getString(R.string.msg_encode_in_progress), true, true, cancelListener);
66 } catch (IllegalArgumentException e) {
67 showErrorMessage(R.string.msg_encode_contents_failed);
74 public final Handler handler = new Handler() {
76 public void handleMessage(Message message) {
77 switch (message.what) {
78 case R.id.encode_succeeded:
79 progressDialog.dismiss();
80 progressDialog = null;
81 Bitmap image = (Bitmap) message.obj;
82 ImageView view = (ImageView) findViewById(R.id.image_view);
83 view.setImageBitmap(image);
84 TextView contents = (TextView) findViewById(R.id.contents_text_view);
85 contents.setText(qrCodeEncoder.getDisplayContents());
88 case R.id.encode_failed:
89 showErrorMessage(R.string.msg_encode_barcode_failed);
96 private final OnClickListener clickListener = new OnClickListener() {
97 public void onClick(DialogInterface dialog, int which) {
102 private final OnCancelListener cancelListener = new OnCancelListener() {
103 public void onCancel(DialogInterface dialog) {
109 public void onCreate(Bundle icicle) {
110 super.onCreate(icicle);
112 Intent intent = getIntent();
113 if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION))) {
114 setContentView(R.layout.encode);
121 protected void onResume() {
124 View layout = findViewById(R.id.encode_view);
125 layout.getViewTreeObserver().addOnGlobalLayoutListener(layoutListener);
129 private void showErrorMessage(int message) {
130 if (progressDialog != null) {
131 progressDialog.dismiss();
132 progressDialog = null;
134 AlertDialog.Builder builder = new AlertDialog.Builder(this);
135 builder.setMessage(message);
136 builder.setPositiveButton(R.string.button_ok, clickListener);