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.encode;
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;
34 import com.google.zxing.client.android.R;
35 import com.google.zxing.client.android.Intents;
38 * This class encodes data from an Intent into a QR code, and then displays it full screen so that
39 * another person can scan it with their device.
41 * @author dswitkin@google.com (Daniel Switkin)
43 final class EncodeActivity extends Activity {
44 private QRCodeEncoder qrCodeEncoder;
45 private ProgressDialog progressDialog;
46 private boolean firstLayout;
49 * This needs to be delayed until after the first layout so that the view dimensions will be
52 private final OnGlobalLayoutListener layoutListener = new OnGlobalLayoutListener() {
53 public void onGlobalLayout() {
55 View layout = findViewById(R.id.encode_view);
56 int width = layout.getWidth();
57 int height = layout.getHeight();
58 int smallerDimension = width < height ? width : height;
59 smallerDimension = smallerDimension * 7 / 8;
61 Intent intent = getIntent();
63 qrCodeEncoder = new QRCodeEncoder(EncodeActivity.this, intent);
64 setTitle(getString(R.string.app_name) + " - " + qrCodeEncoder.getTitle());
65 qrCodeEncoder.requestBarcode(handler, smallerDimension);
66 progressDialog = ProgressDialog.show(EncodeActivity.this, null,
67 getString(R.string.msg_encode_in_progress), true, true, cancelListener);
68 } catch (IllegalArgumentException e) {
69 showErrorMessage(R.string.msg_encode_contents_failed);
76 private final Handler handler = new Handler() {
78 public void handleMessage(Message message) {
79 switch (message.what) {
80 case R.id.encode_succeeded:
81 progressDialog.dismiss();
82 progressDialog = null;
83 Bitmap image = (Bitmap) message.obj;
84 ImageView view = (ImageView) findViewById(R.id.image_view);
85 view.setImageBitmap(image);
86 TextView contents = (TextView) findViewById(R.id.contents_text_view);
87 contents.setText(qrCodeEncoder.getDisplayContents());
90 case R.id.encode_failed:
91 showErrorMessage(R.string.msg_encode_barcode_failed);
98 private final OnClickListener clickListener = new OnClickListener() {
99 public void onClick(DialogInterface dialog, int which) {
104 private final OnCancelListener cancelListener = new OnCancelListener() {
105 public void onCancel(DialogInterface dialog) {
111 public void onCreate(Bundle icicle) {
112 super.onCreate(icicle);
114 Intent intent = getIntent();
115 if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION))) {
116 setContentView(R.layout.encode);
123 protected void onResume() {
126 View layout = findViewById(R.id.encode_view);
127 layout.getViewTreeObserver().addOnGlobalLayoutListener(layoutListener);
131 private void showErrorMessage(int message) {
132 if (progressDialog != null) {
133 progressDialog.dismiss();
134 progressDialog = null;
136 AlertDialog.Builder builder = new AlertDialog.Builder(this);
137 builder.setMessage(message);
138 builder.setPositiveButton(R.string.button_ok, clickListener);