Try GC at OutOfMemoryError

Change-Id: Icfaecc6a0e8858622649ce9115ab94b00e240cc2

java/src/com/android/inputmethod/latin/KeyboardSwitcher.java

@@ -389,11 +389,18 @@ public class KeyboardSwitcher implements SharedPreferences.OnSharedPreferenceCha
             if (LAYOUTS.length <= newLayout) {
                 newLayout = Integer.valueOf(DEFAULT_LAYOUT_ID);
             }
-            try {
-                mInputView = (LatinKeyboardView) mInputMethodService.getLayoutInflater().inflate(
-                        LAYOUTS[newLayout], null);
-            } catch (OutOfMemoryError e) {
-                LatinImeLogger.logOnException(mLayoutId + "," + newLayout, e);
+
+            LatinIMEUtil.GCUtils.getInstance().reset();
+            boolean tryGC = true;
+            for (int i = 0; i < LatinIMEUtil.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
+                try {
+                    mInputView = (LatinKeyboardView) mInputMethodService.getLayoutInflater(
+                            ).inflate(LAYOUTS[newLayout], null);
+                    tryGC = false;
+                } catch (OutOfMemoryError e) {
+                    tryGC = LatinIMEUtil.GCUtils.getInstance().tryGCOrWait(
+                            mLayoutId + "," + newLayout, e);
+                }
             }
             mInputView.setExtentionLayoutResId(LAYOUTS[newLayout]);
             mInputView.setOnKeyboardActionListener(mInputMethodService);

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -291,11 +291,18 @@ public class LatinIME extends InputMethodService
         if (inputLanguage == null) {
             inputLanguage = conf.locale.toString();
         }
-        try {
-            initSuggest(inputLanguage);
-        } catch (OutOfMemoryError e) {
-            LatinImeLogger.logOnException(inputLanguage, e);
+
+        LatinIMEUtil.GCUtils.getInstance().reset();
+        boolean tryGC = true;
+        for (int i = 0; i < LatinIMEUtil.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
+            try {
+                initSuggest(inputLanguage);
+                tryGC = false;
+            } catch (OutOfMemoryError e) {
+                tryGC = LatinIMEUtil.GCUtils.getInstance().tryGCOrWait(inputLanguage, e);
+            }
         }
+
         mOrientation = conf.orientation;
         initSuggestPuncList();
 

java/src/com/android/inputmethod/latin/LatinIMEUtil.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2010 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.inputmethod.latin;
+
+import android.text.format.DateUtils;
+import android.util.Log;
+
+public class LatinIMEUtil {
+    public static class GCUtils {
+        private static final String TAG = "GCUtils";
+        public static final int GC_TRY_COUNT = 2;
+        // GC_TRY_LOOP_MAX is used for the hard limit of GC wait,
+        // GC_TRY_LOOP_MAX should be GC_TRY_COUNT.
+        public static final int GC_TRY_LOOP_MAX = 5;
+        private static final long GC_INTERVAL = DateUtils.SECOND_IN_MILLIS;
+        private static GCUtils sInstance = new GCUtils();
+        private int mGCTryCount = 0;
+
+        public static GCUtils getInstance() {
+            return sInstance;
+        }
+
+        public void reset() {
+            mGCTryCount = 0;
+        }
+
+        public boolean tryGCOrWait(String metaData, OutOfMemoryError oome) {
+            if (LatinImeLogger.sDBG) {
+                Log.d(TAG, "Encountered Out of memory Error. Try GC.");
+            }
+            if (mGCTryCount == 0) {
+                System.gc();
+            }
+            if (++mGCTryCount > GC_TRY_COUNT) {
+                LatinImeLogger.logOnException(metaData, oome);
+                return false;
+            } else {
+                try {
+                    Thread.sleep(GC_INTERVAL);
+                    return true;
+                } catch (InterruptedException e) {
+                    Log.e(TAG, "Sleep was interrupted.");
+                    LatinImeLogger.logOnException(metaData, oome);
+                    return false;
+                }
+            }
+        }
+    }
+}

java/src/com/android/inputmethod/latin/LatinImeLogger.java

@@ -37,7 +37,7 @@ import java.util.List;
 
 public class LatinImeLogger implements SharedPreferences.OnSharedPreferenceChangeListener {
     private static final String TAG = "LatinIMELogs";
-    private static boolean sDBG = false;
+    public static boolean sDBG = false;
     private static boolean sLOGPRINT = false;
     // SUPPRESS_EXCEPTION should be true when released to public.
     private static final boolean SUPPRESS_EXCEPTION = true;

java/src/com/android/inputmethod/latin/LatinKeyboardView.java

@@ -472,10 +472,15 @@ public class LatinKeyboardView extends KeyboardView {
 
     @Override
     public void draw(Canvas c) {
-        try {
-            super.draw(c);
-        } catch (OutOfMemoryError e) {
-            LatinImeLogger.logOnException("draw in LatinKeybaordView", e);
+        LatinIMEUtil.GCUtils.getInstance().reset();
+        boolean tryGC = true;
+        for (int i = 0; i < LatinIMEUtil.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
+            try {
+                super.draw(c);
+                tryGC = false;
+            } catch (OutOfMemoryError e) {
+                tryGC = LatinIMEUtil.GCUtils.getInstance().tryGCOrWait("LatinKeyboardView", e);
+            }
         }
         if (DEBUG_AUTO_PLAY) {
             if (mPlaying) {