android.widget.TextView#removeTextChangedListener ( )源码实例Demo

/**
 * @param textView     an observable text view which content text will be formatted using
 *                     {@link
 *                     Mask}
 * @param initWithMask this flags defines whether hardcoded head of the mask (e.g "+7 ") will
 *                     fill the initial text of the {@code textView}.
 */
protected void installOn(final TextView textView, final boolean initWithMask) {
    if (textView == null) {
        throw new IllegalArgumentException("text view cannot be null");
    }

    this.textView = textView;
    this.initWithMask = initWithMask;

    // try to remove us from listeners (useful in case user's trying to install the formatter twice on a same TextView)
    textView.removeTextChangedListener(this);

    textView.addTextChangedListener(this);

    this.mask = null;
    refreshMask();
}
 

@Override
public void cleanup() {
    for (final Map.Entry<TextView, TextWatcher> entry : mWatching.entrySet()) {
        final TextView v = entry.getKey();
        final TextWatcher watcher = entry.getValue();
        v.removeTextChangedListener(watcher);
    }

    mWatching.clear();
}
 

@Override
public void accumulate(View found) {
    if (found instanceof TextView) {
        final TextView foundTextView = (TextView) found;
        final TextWatcher watcher = new TrackingTextWatcher(foundTextView);
        final TextWatcher oldWatcher = mWatching.get(foundTextView);
        if (null != oldWatcher) {
            foundTextView.removeTextChangedListener(oldWatcher);
        }
        foundTextView.addTextChangedListener(watcher);
        mWatching.put(foundTextView, watcher);
    }
}
 

/**
 * 移除 TextView 监听，避免内存泄露
 */
public void removeViews(TextView... views) {
    if (mViewSet != null && mViewSet.size() > 0) {
        for (TextView view : views) {
            view.removeTextChangedListener(this);
            mViewSet.remove(view);
        }
        // 触发一次监听
        notifyChanged();
    }
}
 

/**
 * 移除所有 TextView 监听，避免内存泄露
 */
public void removeAllViews() {
    if (mViewSet == null) {
        return;
    }

    for (TextView view : mViewSet) {
        view.removeTextChangedListener(this);
    }
    mViewSet.clear();
    mViewSet = null;
}
 

private void setPhoneNumberWatcherToTextView(TextView textView, String countryNameCode) {
  if (!mIsEnablePhoneNumberWatcher) return;

  if (mPhoneNumberWatcher == null) {
    mPhoneNumberWatcher = new PhoneNumberWatcher(countryNameCode);
    textView.addTextChangedListener(mPhoneNumberWatcher);
  } else {
    if (!mPhoneNumberWatcher.getPreviousCountryCode().equalsIgnoreCase(countryNameCode)) {
      textView.removeTextChangedListener(mPhoneNumberWatcher);
      mPhoneNumberWatcher = new PhoneNumberWatcher(countryNameCode);
      textView.addTextChangedListener(mPhoneNumberWatcher);
    }
  }
}
 

private void refreshTextChangedListener(TextView pTextView) {
    LayoutParams lSLLP = getChildLayoutParams(pTextView);

    try {
        pTextView.removeTextChangedListener(mTextWatcher);
    } catch (Throwable e) {
        ex(e);
    }
    if(lSLLP.mTextView_WrapContent_Direction != TextView_WrapContent_Direction.None) {
        pTextView.addTextChangedListener(mTextWatcher);
    }
}
 

/**
 * Default modifier for removing text change listener
 * @param textView - related text view.
 * @param watcher - text watcher which has to be removed.
 */
static void removeTextChangedListener(TextView textView, TextWatcher watcher) {
    textView.removeTextChangedListener(watcher);
}