fix memory leak

Author: Qunhe

keyboard/src/main/java/cn/hadcn/keyboard/emoticon/util/EmoticonHandler.java

@@ -6,9 +6,10 @@
 import android.text.Spannable;
 
 import java.util.ArrayList;
+import java.util.List;
 
-import cn.hadcn.keyboard.emoticon.db.EmoticonDBHelper;
 import cn.hadcn.keyboard.emoticon.EmoticonBean;
+import cn.hadcn.keyboard.emoticon.db.EmoticonDBHelper;
 import cn.hadcn.keyboard.utils.EmoticonLoader;
 import cn.hadcn.keyboard.view.VerticalImageSpan;
 
@@ -17,62 +18,64 @@
  * Created by 90Chris on 2015/11/25.
  */
 public class EmoticonHandler {
-    private static ArrayList<EmoticonBean> mEmoticonBeans = new ArrayList<>();
+    private List<EmoticonBean> mEmoticonBeans = new ArrayList<>();
     private static EmoticonHandler sEmoticonHandler = null;
     private Context mContext;
-    EmoticonDBHelper emoticonDbHelper = null;
+    private EmoticonDBHelper emoticonDbHelper = null;
 
-    public static EmoticonHandler getInstance( @NonNull Context context ) {
-        if ( sEmoticonHandler == null ) {
-            sEmoticonHandler = new EmoticonHandler( context );
+    public static EmoticonHandler getInstance(@NonNull Context context) {
+        if (sEmoticonHandler == null) {
+            sEmoticonHandler = new EmoticonHandler(context.getApplicationContext());
         }
         return sEmoticonHandler;
     }
 
-    private EmoticonHandler( Context context ) {
+    private EmoticonHandler(Context context) {
         mContext = context;
         emoticonDbHelper = new EmoticonDBHelper(context);
     }
 
     public EmoticonDBHelper getEmoticonDbHelper() {
-        if ( emoticonDbHelper == null ) {
+        if (emoticonDbHelper == null) {
             emoticonDbHelper = new EmoticonDBHelper(mContext);
         }
         return emoticonDbHelper;
     }
 
-    public ArrayList<EmoticonBean> loadEmoticonsToMemory() {
+    public List<EmoticonBean> loadEmoticonsToMemory() {
         mEmoticonBeans = emoticonDbHelper.queryAllEmoticonBeans();
         emoticonDbHelper.cleanup();
 
         return mEmoticonBeans;
     }
 
-    public String getEmoticonUriByTag( String tag ) {
+    public String getEmoticonUriByTag(String tag) {
         return emoticonDbHelper.getUriByTag(tag);
     }
 
-    public void setTextFace( String content, Spannable spannable, int start, int size ) {
-        if ( mEmoticonBeans == null ) {
+    public void setTextFace(String content, Spannable spannable, int start, int size) {
+        if (mEmoticonBeans == null) {
             mEmoticonBeans = emoticonDbHelper.queryAllEmoticonBeans();
             emoticonDbHelper.cleanup();
         }
-        if ( content.length() <= 0 ) {
+        if (content.length() <= 0) {
             return;
         }
         int keyIndex = start;
-        for ( EmoticonBean bean : mEmoticonBeans ) {
+        for (EmoticonBean bean : mEmoticonBeans) {
             String key = bean.getTag();
             int keyLength = key.length();
-            while ( keyIndex >= 0 ) {
+            while (keyIndex >= 0) {
                 keyIndex = content.indexOf(key, keyIndex);  //when do not find, get -1
-                if ( keyIndex < 0 ) {
+                if (keyIndex < 0) {
                     break;
                 }
-                Drawable drawable = EmoticonLoader.getInstance(mContext).getDrawable(bean.getIconUri());
+                Drawable drawable = EmoticonLoader.getInstance(mContext).getDrawable(bean
+                        .getIconUri());
                 drawable.setBounds(0, 0, size, size);
                 VerticalImageSpan imageSpan = new VerticalImageSpan(drawable);
-                spannable.setSpan(imageSpan, keyIndex, keyIndex + keyLength, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+                spannable.setSpan(imageSpan, keyIndex, keyIndex + keyLength, Spannable
+                        .SPAN_EXCLUSIVE_EXCLUSIVE);
                 keyIndex += keyLength;
             }
             keyIndex = start;