package com.google.zxing.client.android;
import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
import android.os.Bundle;
+import android.util.Log;
import android.view.View;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.widget.Button;
/**
+ * An HTML-based help screen with Back and Done buttons at the bottom.
+ *
* @author dswitkin@google.com (Daniel Switkin)
*/
public final class HelpActivity extends Activity {
- private static final String DEFAULT_URL = "file:///android_asset/html/index.html";
+ private static final String TAG = HelpActivity.class.getSimpleName();
+
+ // Actually guessing at the Desire's MODEL for now:
+ private static final String[] BUGGY_MODEL_SUBSTRINGS = {
+ "Desire",
+ "Pulse", // Camera doesn't come on
+ "Geeksphone", // Doesn't support YUV?
+ "supersonic", // aka Evo
+ };
+ private static final Uri BUGGY_URI =
+ Uri.parse("http://code.google.com/p/zxing/wiki/FrequentlyAskedQuestions");
+
+ // Use this key and one of the values below when launching this activity via intent. If not
+ // present, the default page will be loaded.
+ public static final String REQUESTED_PAGE_KEY = "requested_page_key";
+ public static final String DEFAULT_PAGE = "index.html";
+ public static final String WHATS_NEW_PAGE = "whatsnew.html";
+
+ private static final String BASE_URL = "file:///android_asset/html/";
+ private static final String WEBVIEW_STATE_PRESENT = "webview_state_present";
- private WebView mWebView;
- private Button mBackButton;
+ private static boolean initialized = false;
+ private WebView webView;
+ private Button backButton;
+
+ private final Button.OnClickListener backListener = new Button.OnClickListener() {
+ public void onClick(View view) {
+ webView.goBack();
+ }
+ };
+
+ private final Button.OnClickListener doneListener = new Button.OnClickListener() {
+ public void onClick(View view) {
+ finish();
+ }
+ };
+
+ private final DialogInterface.OnClickListener groupsListener =
+ new DialogInterface.OnClickListener() {
+ public void onClick(DialogInterface dialogInterface, int i) {
+ Intent intent = new Intent(Intent.ACTION_VIEW, BUGGY_URI);
+ intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
+ HelpActivity.this.startActivity(intent);
+ }
+ };
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.help);
- mWebView = (WebView)findViewById(R.id.help_contents);
- mWebView.setWebViewClient(new HelpClient());
- if (icicle != null) {
- mWebView.restoreState(icicle);
+ webView = (WebView)findViewById(R.id.help_contents);
+ webView.setWebViewClient(new HelpClient());
+
+ // Froyo has a bug with calling onCreate() twice in a row, which causes the What's New page
+ // that's auto-loaded on first run to appear blank. As a workaround we only call restoreState()
+ // if a valid URL was loaded at the time the previous activity was torn down.
+ Intent intent = getIntent();
+ if (icicle != null && icicle.getBoolean(WEBVIEW_STATE_PRESENT, false)) {
+ webView.restoreState(icicle);
+ } else if (intent != null) {
+ String page = intent.getStringExtra(REQUESTED_PAGE_KEY);
+ if (page != null && page.length() > 0) {
+ webView.loadUrl(BASE_URL + page);
+ } else {
+ webView.loadUrl(BASE_URL + DEFAULT_PAGE);
+ }
} else {
- mWebView.loadUrl(DEFAULT_URL);
+ webView.loadUrl(BASE_URL + DEFAULT_PAGE);
}
- mBackButton = (Button)findViewById(R.id.back_button);
- mBackButton.setOnClickListener(mBackListener);
+ backButton = (Button) findViewById(R.id.back_button);
+ backButton.setOnClickListener(backListener);
+ View doneButton = findViewById(R.id.done_button);
+ doneButton.setOnClickListener(doneListener);
- Button doneButton = (Button)findViewById(R.id.done_button);
- doneButton.setOnClickListener(mDoneListener);
+ if (!initialized) {
+ initialized = true;
+ checkBuggyDevice();
+ }
}
- @Override
- public void onResume() {
- super.onResume();
+ private void checkBuggyDevice() {
+ String model = Build.MODEL;
+ Log.i(TAG, "Build model is " + model);
+ if (model != null) {
+ for (String buggyModelSubstring : BUGGY_MODEL_SUBSTRINGS) {
+ if (model.contains(buggyModelSubstring)) {
+ AlertDialog.Builder builder = new AlertDialog.Builder(this);
+ builder.setMessage(R.string.msg_buggy);
+ builder.setPositiveButton(R.string.button_ok, groupsListener);
+ builder.setNegativeButton(R.string.button_cancel, null);
+ builder.show();
+ break;
+ }
+ }
+ }
}
@Override
protected void onSaveInstanceState(Bundle state) {
- mWebView.saveState(state);
+ String url = webView.getUrl();
+ if (url != null && url.length() > 0) {
+ webView.saveState(state);
+ state.putBoolean(WEBVIEW_STATE_PRESENT, true);
+ }
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
- if (mWebView.canGoBack()) {
- mWebView.goBack();
+ if (webView.canGoBack()) {
+ webView.goBack();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
- private final Button.OnClickListener mBackListener = new Button.OnClickListener() {
- public void onClick(View view) {
- mWebView.goBack();
- }
- };
-
- private final Button.OnClickListener mDoneListener = new Button.OnClickListener() {
- public void onClick(View view) {
- finish();
- }
- };
-
private final class HelpClient extends WebViewClient {
-
@Override
public void onPageFinished(WebView view, String url) {
setTitle(view.getTitle());
- mBackButton.setEnabled(view.canGoBack());
+ backButton.setEnabled(view.canGoBack());
}
+ @Override
+ public boolean shouldOverrideUrlLoading(WebView view, String url) {
+ if (url.startsWith("file")) {
+ // Keep local assets in this WebView.
+ return false;
+ } else {
+ // Open external URLs in Browser.
+ startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
+ return true;
+ }
+ }
}
-
}
projects / zxing.git / blobdiff