Android example source code file (JetBoy.java)

This example Android source code file (JetBoy.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, android, app, button, jb, jetboy, jetboythread, jetboyview, keyevent, os, override, play, textview, ui, utilities, view, widget

The JetBoy.java Android example source code

/*
 * Copyright (C) 2009 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.
 */

// Android JET demonstration code:
// See the JetBoyView.java file for examples on the use of the JetPlayer class.

package com.example.android.jetboy;

import com.example.android.jetboy.JetBoyView.JetBoyThread;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class JetBoy extends Activity implements View.OnClickListener {

    /** A handle to the thread that's actually running the animation. */
    private JetBoyThread mJetBoyThread;

    /** A handle to the View in which the game is running. */
    private JetBoyView mJetBoyView;

    // the play start button
    private Button mButton;

    // used to hit retry
    private Button mButtonRetry;

    // the window for instructions and such
    private TextView mTextView;

    // game window timer
    private TextView mTimerView;

    /**
     * Required method from parent class
     * 
     * @param savedInstanceState - The previous instance of this app
     */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        // get handles to the JetView from XML and the JET thread.
        mJetBoyView = (JetBoyView)findViewById(R.id.JetBoyView);
        mJetBoyThread = mJetBoyView.getThread();

        // look up the happy shiny button
        mButton = (Button)findViewById(R.id.Button01);
        mButton.setOnClickListener(this);

        mButtonRetry = (Button)findViewById(R.id.Button02);
        mButtonRetry.setOnClickListener(this);

        // set up handles for instruction text and game timer text
        mTextView = (TextView)findViewById(R.id.text);
        mTimerView = (TextView)findViewById(R.id.timer);

        mJetBoyView.setTimerView(mTimerView);

        mJetBoyView.SetButtonView(mButtonRetry);

        mJetBoyView.SetTextView(mTextView);
    }
    

    /**
     * Handles component interaction
     * 
     * @param v The object which has been clicked
     */
    public void onClick(View v) {
        // this is the first screen
        if (mJetBoyThread.getGameState() == JetBoyThread.STATE_START) {
            mButton.setText("PLAY!");
            mTextView.setVisibility(View.VISIBLE);

            mTextView.setText(R.string.helpText);
            mJetBoyThread.setGameState(JetBoyThread.STATE_PLAY);

        }
        // we have entered game play, now we about to start running
        else if (mJetBoyThread.getGameState() == JetBoyThread.STATE_PLAY) {
            mButton.setVisibility(View.INVISIBLE);
            mTextView.setVisibility(View.INVISIBLE);
            mTimerView.setVisibility(View.VISIBLE);
            mJetBoyThread.setGameState(JetBoyThread.STATE_RUNNING);

        }
        // this is a retry button
        else if (mButtonRetry.equals(v)) {

            mTextView.setText(R.string.helpText);

            mButton.setText("PLAY!");
            mButtonRetry.setVisibility(View.INVISIBLE);
            // mButtonRestart.setVisibility(View.INVISIBLE);

            mTextView.setVisibility(View.VISIBLE);
            mButton.setText("PLAY!");
            mButton.setVisibility(View.VISIBLE);

            mJetBoyThread.setGameState(JetBoyThread.STATE_PLAY);

        } else {
            Log.d("JB VIEW", "unknown click " + v.getId());

            Log.d("JB VIEW", "state is  " + mJetBoyThread.mState);

        }
    }

    /**
     * Standard override to get key-press events.
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent msg) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            return super.onKeyDown(keyCode, msg);
        } else {
            return mJetBoyThread.doKeyDown(keyCode, msg);
        }
    }

    /**
     * Standard override for key-up.
     */
    @Override
    public boolean onKeyUp(int keyCode, KeyEvent msg) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            return super.onKeyUp(keyCode, msg);
        } else {
            return mJetBoyThread.doKeyUp(keyCode, msg);
        }
    }
}