BasicGestureDetectFragment.java

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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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*      http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.basicgesturedetect;
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import android.content.Intent;
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import android.os.Bundle;
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import android.support.v4.app.Fragment;
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import android.view.GestureDetector;
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import android.view.MenuItem;
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import android.view.MotionEvent;
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import android.view.View;
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import com.example.android.common.logger.Log;
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import com.example.android.common.logger.LogFragment;
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public class BasicGestureDetectFragment extends Fragment{
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    @Override
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    public void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setHasOptionsMenu(true);
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    }
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    @Override
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    public void onActivityCreated(Bundle savedInstanceState) {
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        super.onActivityCreated(savedInstanceState);
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        View gestureView = getActivity().findViewById(R.id.sample_output);
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        gestureView.setClickable(true);
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        gestureView.setFocusable(true);
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        // First create the GestureListener that will include all our callbacks.
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        // Then create the GestureDetector, which takes that listener as an argument.
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        GestureDetector.SimpleOnGestureListener gestureListener = new GestureListener();
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        final GestureDetector gd = new GestureDetector(getActivity(), gestureListener);
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        /* For the view where gestures will occur, create an onTouchListener that sends
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         * all motion events to the gesture detector.  When the gesture detector
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         * actually detects an event, it will use the callbacks you created in the
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         * SimpleOnGestureListener to alert your application.
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        */
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        gestureView.setOnTouchListener(new View.OnTouchListener() {
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            @Override
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            public boolean onTouch(View view, MotionEvent motionEvent) {
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                gd.onTouchEvent(motionEvent);
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                return false;
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            }
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        });
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    }
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    @Override
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    public boolean onOptionsItemSelected(MenuItem item) {
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        if (item.getItemId() == R.id.sample_action) {
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            clearLog();
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        }
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        return true;
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    }
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    public void clearLog() {
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        LogFragment logFragment =  ((LogFragment) getActivity().getSupportFragmentManager()
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                .findFragmentById(R.id.log_fragment));
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        logFragment.getLogView().setText("");
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    }
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}