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/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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.android.settings;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemProperties;
import android.text.TextUtils;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnDismissListener;
import android.content.res.Configuration;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.zip.GZIPInputStream;
/**
* The "dialog" that shows from "License" in the Settings app.
*/
public class SettingsLicenseActivity extends Activity {
private static final String TAG = "SettingsLicenseActivity";
private static final boolean LOGV = false || false;
private static final String DEFAULT_LICENSE_PATH = "/system/etc/NOTICE.html.gz";
private static final String PROPERTY_LICENSE_PATH = "ro.config.license_path";
private Handler mHandler;
private WebView mWebView;
private ProgressDialog mSpinnerDlg;
private AlertDialog mTextDlg;
private class LicenseFileLoader implements Runnable {
private static final String INNER_TAG = "SettingsLicenseActivity.LicenseFileLoader";
public static final int STATUS_OK = 0;
public static final int STATUS_NOT_FOUND = 1;
public static final int STATUS_READ_ERROR = 2;
public static final int STATUS_EMPTY_FILE = 3;
private String mFileName;
private Handler mHandler;
public LicenseFileLoader(String fileName, Handler handler) {
mFileName = fileName;
mHandler = handler;
}
public void run() {
int status = STATUS_OK;
InputStreamReader inputReader = null;
StringBuilder data = new StringBuilder(2048);
try {
char[] tmp = new char[2048];
int numRead;
if (mFileName.endsWith(".gz")) {
inputReader = new InputStreamReader(
new GZIPInputStream(new FileInputStream(mFileName)));
} else {
inputReader = new FileReader(mFileName);
}
while ((numRead = inputReader.read(tmp)) >= 0) {
data.append(tmp, 0, numRead);
}
} catch (FileNotFoundException e) {
Log.e(INNER_TAG, "License HTML file not found at " + mFileName, e);
status = STATUS_NOT_FOUND;
} catch (IOException e) {
Log.e(INNER_TAG, "Error reading license HTML file at " + mFileName, e);
status = STATUS_READ_ERROR;
} finally {
try {
if (inputReader != null) {
inputReader.close();
}
} catch (IOException e) {
}
}
if ((status == STATUS_OK) && TextUtils.isEmpty(data)) {
Log.e(INNER_TAG, "License HTML is empty (from " + mFileName + ")");
status = STATUS_EMPTY_FILE;
}
// Tell the UI thread that we are finished.
Message msg = mHandler.obtainMessage(status, null);
if (status == STATUS_OK) {
msg.obj = data.toString();
}
mHandler.sendMessage(msg);
}
}
public SettingsLicenseActivity() {
super();
mHandler = null;
mWebView = null;
mSpinnerDlg = null;
mTextDlg = null;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String fileName = SystemProperties.get(PROPERTY_LICENSE_PATH, DEFAULT_LICENSE_PATH);
if (TextUtils.isEmpty(fileName)) {
Log.e(TAG, "The system property for the license file is empty.");
showErrorAndFinish();
return;
}
// The activity does not have any view itself,
// so set it invisible to avoid displaying the title text in the background.
setVisible(false);
mWebView = new WebView(this);
mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == LicenseFileLoader.STATUS_OK) {
String text = (String) msg.obj;
showPageOfText(text);
} else {
showErrorAndFinish();
}
}
};
CharSequence title = getText(R.string.settings_license_activity_title);
CharSequence msg = getText(R.string.settings_license_activity_loading);
ProgressDialog pd = ProgressDialog.show(this, title, msg, true, false);
pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mSpinnerDlg = pd;
// Start separate thread to do the actual loading.
Thread thread = new Thread(new LicenseFileLoader(fileName, mHandler));
thread.start();
}
@Override
protected void onDestroy() {
if (mTextDlg != null && mTextDlg.isShowing()) {
mTextDlg.dismiss();
}
if (mSpinnerDlg != null && mSpinnerDlg.isShowing()) {
mSpinnerDlg.dismiss();
}
super.onDestroy();
}
private void showPageOfText(String text) {
// Create an AlertDialog to display the WebView in.
AlertDialog.Builder builder = new AlertDialog.Builder(SettingsLicenseActivity.this);
builder.setCancelable(true)
.setView(mWebView)
.setTitle(R.string.settings_license_activity_title);
mTextDlg = builder.create();
mTextDlg.setOnDismissListener(new OnDismissListener() {
public void onDismiss(DialogInterface dlgi) {
SettingsLicenseActivity.this.finish();
}
});
// Begin the loading. This will be done in a separate thread in WebView.
mWebView.loadDataWithBaseURL(null, text, "text/html", "utf-8", null);
mWebView.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
mSpinnerDlg.dismiss();
if (SettingsLicenseActivity.this.isResumed()) {
mTextDlg.show();
}
}
});
mWebView = null;
}
private void showErrorAndFinish() {
mSpinnerDlg.dismiss();
mSpinnerDlg = null;
Toast.makeText(this, R.string.settings_license_activity_unavailable, Toast.LENGTH_LONG)
.show();
finish();
}
}
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