Remove char state cache.

Removes charpool which caches char state objects to be reused. This
charpool was causing char state objects to duplicate.

Fixes: 265978605
Test: open pin and spam enter to reset pin and spam pin numbers. I
eventually get a duplicate. I also logged the char state array to
confirm that the same char state object is being added in append.

Change-Id: I9724fcf8d29d43069e298bb0407cea90405741b7

packages/SystemUI/src/com/android/keyguard/PasswordTextView.java

@@ -47,7 +47,6 @@ import com.android.settingslib.Utils;
 import com.android.systemui.R;
 
 import java.util.ArrayList;
-import java.util.Stack;
 
 /**
  * A View similar to a textView which contains password text and can animate when the text is
@@ -92,7 +91,6 @@ public class PasswordTextView extends View {
     private final int mGravity;
     private ArrayList<CharState> mTextChars = new ArrayList<>();
     private String mText = "";
-    private Stack<CharState> mCharPool = new Stack<>();
     private int mDotSize;
     private PowerManager mPM;
     private int mCharPadding;
@@ -310,13 +308,7 @@ public class PasswordTextView extends View {
     }
 
     private CharState obtainCharState(char c) {
-        CharState charState;
-        if(mCharPool.isEmpty()) {
-            charState = new CharState();
-        } else {
-            charState = mCharPool.pop();
-            charState.reset();
-        }
+        CharState charState = new CharState();
         charState.whichChar = c;
         return charState;
     }
@@ -343,8 +335,6 @@ public class PasswordTextView extends View {
                 maxDelay = Math.min(maxDelay, RESET_MAX_DELAY) + DISAPPEAR_DURATION;
                 charState.startRemoveAnimation(startDelay, maxDelay);
                 charState.removeDotSwapCallbacks();
-            } else {
-                mCharPool.push(charState);
             }
         }
         if (!animated) {
@@ -421,8 +411,6 @@ public class PasswordTextView extends View {
             public void onAnimationEnd(Animator animation) {
                 if (!mCancelled) {
                     mTextChars.remove(CharState.this);
-                    mCharPool.push(CharState.this);
-                    reset();
                     cancelAnimator(textTranslateAnimator);
                     textTranslateAnimator = null;
                 }
@@ -518,21 +506,6 @@ public class PasswordTextView extends View {
             }
         };
 
-        void reset() {
-            whichChar = 0;
-            currentTextSizeFactor = 0.0f;
-            currentDotSizeFactor = 0.0f;
-            currentWidthFactor = 0.0f;
-            cancelAnimator(textAnimator);
-            textAnimator = null;
-            cancelAnimator(dotAnimator);
-            dotAnimator = null;
-            cancelAnimator(widthAnimator);
-            widthAnimator = null;
-            currentTextTranslationY = 1.0f;
-            removeDotSwapCallbacks();
-        }
-
         void startRemoveAnimation(long startDelay, long widthDelay) {
             boolean dotNeedsAnimation = (currentDotSizeFactor > 0.0f && dotAnimator == null)
                     || (dotAnimator != null && dotAnimationIsGrowing);