java/src/com/android/inputmethod/research/FeedbackLayout.java

/*
 * Copyright (C) 2012 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.research;

import android.app.Activity;
import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.widget.LinearLayout;

public class FeedbackLayout extends LinearLayout {
    private Activity mActivity;

    public FeedbackLayout(Context context) {
        super(context);
    }

    public FeedbackLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FeedbackLayout(Context context, AttributeSet attrs, int defstyle) {
        super(context, attrs, defstyle);
    }

    public void setActivity(Activity activity) {
        mActivity = activity;
    }

    @Override
    public boolean dispatchKeyEventPreIme(KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
            KeyEvent.DispatcherState state = getKeyDispatcherState();
            if (state != null) {
                if (event.getAction() == KeyEvent.ACTION_DOWN
                        && event.getRepeatCount() == 0) {
                    state.startTracking(event, this);
                    return true;
                } else if (event.getAction() == KeyEvent.ACTION_UP
                        && !event.isCanceled() && state.isTracking(event)) {
                    mActivity.onBackPressed();
                    return true;
                }
            }
        }
        return super.dispatchKeyEventPreIme(event);
    }
}