Android example source code file (MainMenu.java)

This example Android source code file (MainMenu.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activity_test, alertdialog, android, app, application, charsequence, content, dialog, frame, intent, mainmenu, no, override, preference, preferenceactivity, preferences, profilerecorder, results_dialog, sim, string

The MainMenu.java Android example source code

/*
 * Copyright (C) 2010 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.heightmapprofiler;

import com.android.heightmapprofiler.R;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;

/**
 * Main entry point for the HeightMapTest application.  
 */
public class MainMenu extends PreferenceActivity implements Preference.OnPreferenceClickListener {
    private static final int ACTIVITY_TEST = 0;
    private static final int RESULTS_DIALOG = 0;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // Load the preferences from an XML resource
        addPreferencesFromResource(R.xml.preferences);

        Preference runTestButton = getPreferenceManager().findPreference("runtest");
        if (runTestButton != null) {
        	runTestButton.setOnPreferenceClickListener(this);
        }
         
    }
    
  
    /** Creates the test results dialog and fills in a dummy message. */
    @Override
    protected Dialog onCreateDialog(int id) {
        Dialog dialog = null;
        if (id == RESULTS_DIALOG) {
            
            String dummy = "No results yet.";
            CharSequence sequence = dummy.subSequence(0, dummy.length() -1);
            dialog = new AlertDialog.Builder(this)
                .setTitle(R.string.dialog_title)
                .setPositiveButton(R.string.dialog_ok, null)
                .setMessage(sequence)
                .create();
        }
        return dialog;
    }
    
    /** 
     * Replaces the dummy message in the test results dialog with a string that
     * describes the actual test results.
     */
    protected void onPrepareDialog (int id, Dialog dialog) {
        if (id == RESULTS_DIALOG) {
            // Extract final timing information from the profiler.
            final ProfileRecorder profiler = ProfileRecorder.sSingleton;
            final long frameVerts = profiler.getAverageVerts();
            
            final long frameTime = 
                profiler.getAverageTime(ProfileRecorder.PROFILE_FRAME);
            final long frameMin = 
                profiler.getMinTime(ProfileRecorder.PROFILE_FRAME);
            final long frameMax = 
                profiler.getMaxTime(ProfileRecorder.PROFILE_FRAME);
            
            final long drawTime = 
                    profiler.getAverageTime(ProfileRecorder.PROFILE_DRAW);
            final long drawMin = 
                    profiler.getMinTime(ProfileRecorder.PROFILE_DRAW);
            final long drawMax = 
                    profiler.getMaxTime(ProfileRecorder.PROFILE_DRAW);

            final long simTime = 
                    profiler.getAverageTime(ProfileRecorder.PROFILE_SIM);
            final long simMin = 
                    profiler.getMinTime(ProfileRecorder.PROFILE_SIM);
            final long simMax = 
                    profiler.getMaxTime(ProfileRecorder.PROFILE_SIM);
            
            
            final float fps = frameTime > 0 ? 1000.0f / frameTime : 0.0f;
            
            String result = "Frame: " +  frameTime + "ms (" + fps + " fps)\n"
                + "\t\tMin: " + frameMin + "ms\t\tMax: " + frameMax + "\n" 
                + "Draw: " + drawTime + "ms\n"
                + "\t\tMin: " + drawMin + "ms\t\tMax: " + drawMax + "\n"
                + "Sim: " + simTime + "ms\n"
                + "\t\tMin: " + simMin + "ms\t\tMax: " + simMax + "\n"
                + "\nVerts per frame: ~" + frameVerts + "\n";
            CharSequence sequence = result.subSequence(0, result.length() -1);
            AlertDialog alertDialog = (AlertDialog)dialog;
            alertDialog.setMessage(sequence);
        }
    }
    
    /** Shows the results dialog when the test activity closes. */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, 
            Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        showDialog(RESULTS_DIALOG);
             
    }


	public boolean onPreferenceClick(Preference preference) {
		Intent i = new Intent(this, HeightMapTest.class);
		startActivityForResult(i, ACTIVITY_TEST);
		return true;
	}
   
}