Fix issue #2438980: Implement package watcher for voice recognizer service setting

I am getting tired of writing package monitor code, realized this is missing in
a number of places, and at this point it has gotten complicated enough that I
don't think anyone actually does it 100% right so:

Introducing PackageMonitor.

Yes there are no Java docs.  I am still playing around with just what this
thing is to figure out what makes sense and how people will use it.  It is
being used to fix this bug for monitoring voice recognizers (integrating the
code from the settings provider for setting an initial value), to replace
the existing code for monitoring input methods (and fix the bug where we
wouldn't remove an input method from the enabled list when it got
uninstalled), to now monitor live wallpaper package changes (now allowing
us to avoid reverting back to the default live wallpaper when the current
one is updated!), and to monitor device admin changes.

Also includes a fix so you can't uninstall an .apk that is currently enabled
as a device admin.

Also includes a fix where the default time zone was not initialized early
enough which should fix issue #2455507 (Observed Google services frame work crash).

In addition, this finally introduces a mechanism to determine if the
"force stop" button should be enabled, with convenience in PackageMonitor
for system services to handle it.  All services have been updated to support
this.  There is also new infrastructure for reporting battery usage as an
applicatin error report.

1 files changed, 138 insertions, 128 deletions

diff --git a/services/java/com/android/server/InputMethodManagerService.java b/services/java/com/android/server/InputMethodManagerService.java
index 5e96a2fd2d15..59d4c9b5a6ff 100644
--- a/services/java/com/android/server/InputMethodManagerService.java
+++ b/services/java/com/android/server/InputMethodManagerService.java
@@ -16,6 +16,7 @@
 
 package com.android.server;
 
+import com.android.internal.content.PackageMonitor;
 import com.android.internal.os.HandlerCaller;
 import com.android.internal.view.IInputContext;
 import com.android.internal.view.IInputMethod;
@@ -48,7 +49,6 @@ import android.content.pm.ServiceInfo;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.database.ContentObserver;
-import android.net.Uri;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.IBinder;
@@ -332,51 +332,68 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
         }
     }
 
-    class PackageReceiver extends android.content.BroadcastReceiver {
+    class MyPackageMonitor extends PackageMonitor {
+        
         @Override
-        public void onReceive(Context context, Intent intent) {
-            String action = intent.getAction();
-            String pkgList[] = null;
-            if (Intent.ACTION_PACKAGE_ADDED.equals(action) ||
-                    Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
-                Uri uri = intent.getData();
-                String pkg = uri != null ? uri.getSchemeSpecificPart() : null;
-                if (pkg != null) {
-                    pkgList = new String[] { pkg };
+        public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) {
+            synchronized (mMethodMap) {
+                String curInputMethodId = Settings.Secure.getString(mContext
+                        .getContentResolver(), Settings.Secure.DEFAULT_INPUT_METHOD);
+                final int N = mMethodList.size();
+                if (curInputMethodId != null) {
+                    for (int i=0; i<N; i++) {
+                        InputMethodInfo imi = mMethodList.get(i);
+                        if (imi.getId().equals(curInputMethodId)) {
+                            for (String pkg : packages) {
+                                if (imi.getPackageName().equals(pkg)) {
+                                    if (!doit) {
+                                        return true;
+                                    }
+                                    
+                                    Settings.Secure.putString(mContext.getContentResolver(),
+                                            Settings.Secure.DEFAULT_INPUT_METHOD, "");
+                                    chooseNewDefaultIMELocked();
+                                    return true;
+                                }
+                            }
+                        }
+                    }
                 }
-            } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE.equals(action) ||
-                    Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) {
-                pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST);
             }
-            if (pkgList == null || pkgList.length == 0) {
-                return;
-            }
-            synchronized (mMethodMap) {
-                buildInputMethodListLocked(mMethodList, mMethodMap);
+            return false;
+        }
 
+        @Override
+        public void onSomePackagesChanged() {
+            synchronized (mMethodMap) {
                 InputMethodInfo curIm = null;
-                String curInputMethodId = Settings.Secure.getString(context
+                String curInputMethodId = Settings.Secure.getString(mContext
                         .getContentResolver(), Settings.Secure.DEFAULT_INPUT_METHOD);
                 final int N = mMethodList.size();
                 if (curInputMethodId != null) {
                     for (int i=0; i<N; i++) {
-                        if (mMethodList.get(i).getId().equals(curInputMethodId)) {
-                            curIm = mMethodList.get(i);
+                        InputMethodInfo imi = mMethodList.get(i);
+                        if (imi.getId().equals(curInputMethodId)) {
+                            curIm = imi;
+                        }
+                        int change = isPackageDisappearing(imi.getPackageName());
+                        if (change == PACKAGE_TEMPORARY_CHANGE
+                                || change == PACKAGE_PERMANENT_CHANGE) {
+                            Log.i(TAG, "Input method uninstalled, disabling: "
+                                    + imi.getComponent());
+                            setInputMethodEnabledLocked(imi.getId(), false);
                         }
                     }
                 }
 
+                buildInputMethodListLocked(mMethodList, mMethodMap);
+
                 boolean changed = false;
 
                 if (curIm != null) {
-                    boolean foundPkg = false;
-                    for (String pkg : pkgList) {
-                        if (curIm.getPackageName().equals(pkg)) {
-                            foundPkg = true;
-                            break;
-                        }
-                    }
-                    if (foundPkg) {
+                    int change = isPackageDisappearing(curIm.getPackageName()); 
+                    if (change == PACKAGE_TEMPORARY_CHANGE
+                            || change == PACKAGE_PERMANENT_CHANGE) {
                         ServiceInfo si = null;
                         try {
                             si = mContext.getPackageManager().getServiceInfo(
@@ -387,7 +404,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                             // Uh oh, current input method is no longer around!
                             // Pick another one...
                             Log.i(TAG, "Current input method removed: " + curInputMethodId);
-                            if (!chooseNewDefaultIME()) {
+                            if (!chooseNewDefaultIMELocked()) {
                                 changed = true;
                                 curIm = null;
                                 curInputMethodId = "";
@@ -397,16 +414,17 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                                         curInputMethodId);
                             }
                         }
-
-                    } else if (curIm == null) {
-                        // We currently don't have a default input method... is
-                        // one now available?
-                        changed = chooseNewDefaultIME();
                     }
+                }
+                
+                if (curIm == null) {
+                    // We currently don't have a default input method... is
+                    // one now available?
+                    changed = chooseNewDefaultIMELocked();
+                }
 
-                    if (changed) {
-                        updateFromSettingsLocked();
-                    }
+                if (changed) {
+                    updateFromSettingsLocked();
                 }
             }
         }
@@ -438,19 +456,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
             }
         });
 
-        PackageReceiver mBroadcastReceiver = new PackageReceiver();
-        IntentFilter packageFilt = new IntentFilter();
-        packageFilt.addAction(Intent.ACTION_PACKAGE_ADDED);
-        packageFilt.addAction(Intent.ACTION_PACKAGE_CHANGED);
-        packageFilt.addAction(Intent.ACTION_PACKAGE_REMOVED);
-        packageFilt.addAction(Intent.ACTION_PACKAGE_RESTARTED);
-        packageFilt.addDataScheme("package");
-        mContext.registerReceiver(mBroadcastReceiver, packageFilt);
-        // Register for events related to sdcard installation.
-        IntentFilter sdFilter = new IntentFilter();
-        sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
-        sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
-        mContext.registerReceiver(mBroadcastReceiver, sdFilter);
+        (new MyPackageMonitor()).register(mContext, true);
 
         IntentFilter screenOnOffFilt = new IntentFilter();
         screenOnOffFilt.addAction(Intent.ACTION_SCREEN_ON);
@@ -1385,7 +1391,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                 & ApplicationInfo.FLAG_SYSTEM) != 0;
     }
 
-    private boolean chooseNewDefaultIME() {
+    private boolean chooseNewDefaultIMELocked() {
         List<InputMethodInfo> enabled = getEnabledInputMethodListLocked();
         if (enabled != null && enabled.size() > 0) {
             Settings.Secure.putString(mContext.getContentResolver(),
@@ -1446,7 +1452,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
         String defaultIme = Settings.Secure.getString(mContext
                 .getContentResolver(), Settings.Secure.DEFAULT_INPUT_METHOD);
         if (!map.containsKey(defaultIme)) {
-            if (chooseNewDefaultIME()) {
+            if (chooseNewDefaultIMELocked()) {
                 updateFromSettingsLocked();
             }
         }
@@ -1557,90 +1563,94 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                         "Requires permission "
                         + android.Manifest.permission.WRITE_SECURE_SETTINGS);
             }
-
+            
             long ident = Binder.clearCallingIdentity();
             try {
-                // Make sure this is a valid input method.
-                InputMethodInfo imm = mMethodMap.get(id);
-                if (imm == null) {
-                    if (imm == null) {
-                        throw new IllegalArgumentException("Unknown id: " + mCurMethodId);
-                    }
-                }
+                return setInputMethodEnabledLocked(id, enabled);
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+    }
+    
+    boolean setInputMethodEnabledLocked(String id, boolean enabled) {
+        // Make sure this is a valid input method.
+        InputMethodInfo imm = mMethodMap.get(id);
+        if (imm == null) {
+            if (imm == null) {
+                throw new IllegalArgumentException("Unknown id: " + mCurMethodId);
+            }
+        }
 
-                StringBuilder builder = new StringBuilder(256);
-
-                boolean removed = false;
-                String firstId = null;
-
-                // Look through the currently enabled input methods.
-                String enabledStr = Settings.Secure.getString(mContext.getContentResolver(),
-                        Settings.Secure.ENABLED_INPUT_METHODS);
-                if (enabledStr != null) {
-                    final TextUtils.SimpleStringSplitter splitter = mStringColonSplitter;
-                    splitter.setString(enabledStr);
-                    while (splitter.hasNext()) {
-                        String curId = splitter.next();
-                        if (curId.equals(id)) {
-                            if (enabled) {
-                                // We are enabling this input method, but it is
-                                // already enabled.  Nothing to do.  The previous
-                                // state was enabled.
-                                return true;
-                            }
-                            // We are disabling this input method, and it is
-                            // currently enabled.  Skip it to remove from the
-                            // new list.
-                            removed = true;
-                        } else if (!enabled) {
-                            // We are building a new list of input methods that
-                            // doesn't contain the given one.
-                            if (firstId == null) firstId = curId;
-                            if (builder.length() > 0) builder.append(':');
-                            builder.append(curId);
-                        }
-                    }
-                }
+        StringBuilder builder = new StringBuilder(256);
 
-                if (!enabled) {
-                    if (!removed) {
-                        // We are disabling the input method but it is already
-                        // disabled.  Nothing to do.  The previous state was
-                        // disabled.
-                        return false;
-                    }
-                    // Update the setting with the new list of input methods.
-                    Settings.Secure.putString(mContext.getContentResolver(),
-                            Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());
-                    // We the disabled input method is currently selected, switch
-                    // to another one.
-                    String selId = Settings.Secure.getString(mContext.getContentResolver(),
-                            Settings.Secure.DEFAULT_INPUT_METHOD);
-                    if (id.equals(selId)) {
-                        Settings.Secure.putString(mContext.getContentResolver(),
-                                Settings.Secure.DEFAULT_INPUT_METHOD,
-                                firstId != null ? firstId : "");
-                    }
-                    // Previous state was enabled.
-                    return true;
-                }
+        boolean removed = false;
+        String firstId = null;
 
-                // Add in the newly enabled input method.
-                if (enabledStr == null || enabledStr.length() == 0) {
-                    enabledStr = id;
-                } else {
-                    enabledStr = enabledStr + ':' + id;
+        // Look through the currently enabled input methods.
+        String enabledStr = Settings.Secure.getString(mContext.getContentResolver(),
+                Settings.Secure.ENABLED_INPUT_METHODS);
+        if (enabledStr != null) {
+            final TextUtils.SimpleStringSplitter splitter = mStringColonSplitter;
+            splitter.setString(enabledStr);
+            while (splitter.hasNext()) {
+                String curId = splitter.next();
+                if (curId.equals(id)) {
+                    if (enabled) {
+                        // We are enabling this input method, but it is
+                        // already enabled.  Nothing to do.  The previous
+                        // state was enabled.
+                        return true;
+                    }
+                    // We are disabling this input method, and it is
+                    // currently enabled.  Skip it to remove from the
+                    // new list.
+                    removed = true;
+                } else if (!enabled) {
+                    // We are building a new list of input methods that
+                    // doesn't contain the given one.
+                    if (firstId == null) firstId = curId;
+                    if (builder.length() > 0) builder.append(':');
+                    builder.append(curId);
                 }
+            }
+        }
 
-                Settings.Secure.putString(mContext.getContentResolver(),
-                        Settings.Secure.ENABLED_INPUT_METHODS, enabledStr);
-
-                // Previous state was disabled.
+        if (!enabled) {
+            if (!removed) {
+                // We are disabling the input method but it is already
+                // disabled.  Nothing to do.  The previous state was
+                // disabled.
                 return false;
-            } finally {
-                Binder.restoreCallingIdentity(ident);
             }
+            // Update the setting with the new list of input methods.
+            Settings.Secure.putString(mContext.getContentResolver(),
+                    Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());
+            // We the disabled input method is currently selected, switch
+            // to another one.
+            String selId = Settings.Secure.getString(mContext.getContentResolver(),
+                    Settings.Secure.DEFAULT_INPUT_METHOD);
+            if (id.equals(selId)) {
+                Settings.Secure.putString(mContext.getContentResolver(),
+                        Settings.Secure.DEFAULT_INPUT_METHOD,
+                        firstId != null ? firstId : "");
+            }
+            // Previous state was enabled.
+            return true;
+        }
+
+        // Add in the newly enabled input method.
+        if (enabledStr == null || enabledStr.length() == 0) {
+            enabledStr = id;
+        } else {
+            enabledStr = enabledStr + ':' + id;
         }
+
+        Settings.Secure.putString(mContext.getContentResolver(),
+                Settings.Secure.ENABLED_INPUT_METHODS, enabledStr);
+
+        // Previous state was disabled.
+        return false;
     }
 
     // ----------------------------------------------------------------------