commit fc2e1ac0551cf3ea7cfc22f37459a52420f902ec
author Xingrun Chen <cxr514033970@gmail.com> Tue Jun 12 14:15:39 2012 +0800
committer Roger Chen <cxr514033970@gmail.com> Thu Jul 26 00:41:15 2012 +0800
tree 7023fd1c91303a2b6553b453f678303ecf4d350a
parent 9ad4a89877363a6f1128b258f6535b29d2f778e2

Don't direct to market if no markets installed

The search intent cannot be resolved if there aren't any
market apps installed, so it will cause Settings crashed by
the ActivityNotFound exception.

So we need to check if the market intent requst can be resolved.
Then determine to notify user to direct the accessibility services
to market to get TalkBack or not.

Change-Id: I0f0d7b54eb5215e1a886315bb6816704384f6c59
Signed-off-by: Roger Chen <cxr514033970@gmail.com>

src/com/android/settings/AccessibilitySettings.java

diff --git a/src/com/android/settings/AccessibilitySettings.java b/src/com/android/settings/AccessibilitySettings.java
index 6167f78..89937ec 100644
--- a/src/com/android/settings/AccessibilitySettings.java
+++ b/src/com/android/settings/AccessibilitySettings.java
@@ -179,9 +179,9 @@
         super.onResume();
         loadInstalledServices();
         updateAllPreferences();
-        if (mServicesCategory.getPreference(0) == mNoServicesMessagePreference) {
-            offerInstallAccessibilitySerivceOnce();
-        }
+
+        offerInstallAccessibilitySerivceOnce();
+
         mSettingsPackageMonitor.register(getActivity(), getActivity().getMainLooper(), false);
         RotationPolicy.registerRotationPolicyListener(getActivity(),
                 mRotationPolicyListener);
@@ -465,6 +465,17 @@
         final boolean offerInstallService = !preferences.getBoolean(
                 KEY_INSTALL_ACCESSIBILITY_SERVICE_OFFERED_ONCE, false);
         if (offerInstallService) {
+            String screenreaderMarketLink = SystemProperties.get(
+                    SYSTEM_PROPERTY_MARKET_URL,
+                    DEFAULT_SCREENREADER_MARKET_LINK);
+            Uri marketUri = Uri.parse(screenreaderMarketLink);
+            Intent marketIntent = new Intent(Intent.ACTION_VIEW, marketUri);
+
+            if (getPackageManager().resolveActivity(marketIntent, 0) == null) {
+                // Don't show the dialog if no market app is found/installed.
+                return;
+            }
+
             preferences.edit().putBoolean(KEY_INSTALL_ACCESSIBILITY_SERVICE_OFFERED_ONCE,
                     true).commit();
             // Notify user that they do not have any accessibility