Android 使用线性布局LinearLayout和Button实现一个点红块游戏

package com.example.redpoint;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.os.Build;

public class MainActivity extends ActionBarActivity {

    private int redId;
    private int score = 0;
    private TextView textView1;
    private Button[] buttons = new Button[9];
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        textView1 = (TextView) findViewById(R.id.textView1);
        textView1.setText("当前得分：0");
        buttons[0] = (Button) findViewById(R.id.button0);
        buttons[1] = (Button) findViewById(R.id.button1);
        buttons[2] = (Button) findViewById(R.id.button2);
        buttons[3] = (Button) findViewById(R.id.button3);
        buttons[4] = (Button) findViewById(R.id.button4);
        buttons[5] = (Button) findViewById(R.id.button5);
        buttons[6] = (Button) findViewById(R.id.button6);
        buttons[7] = (Button) findViewById(R.id.button7);
        buttons[8] = (Button) findViewById(R.id.button8);
        
        redId = (int) (Math.random() * 9) % 9;
        buttons[redId].setBackgroundColor(Color.rgb(255, 0, 0));
        
        for (int i = 0; i < 9; i ++) {
            buttons[i].setOnClickListener(new MyOnClickListener(this, i));
        }
    }
    
    class MyOnClickListener implements OnClickListener {
        
        private Activity context;
        private int id;
        
        public MyOnClickListener(Activity context, int id) {
            this.context = context;
            this.id = id;
        }

        @Override
        public void onClick(View arg0) {
            if (id == redId) {
                score += 10;
                buttons[redId].setBackgroundColor(Color.rgb(238, 238, 238));
                redId = (int) (Math.random() * 9) % 9;
                buttons[redId].setBackgroundColor(Color.rgb(255, 0, 0));
            } else {
                score -= 10;
            }
            textView1.setText("当前得分：" + score);
        }
        
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:text="当前分数：0"
        android:layout_weight="1" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:layout_weight="2"
        android:orientation="horizontal"
        >
        
        <Button
        android:id="@+id/button0"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:layout_weight="2"
        android:orientation="horizontal"
        >
        
         <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="left"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button5"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="right"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:layout_weight="2"
        android:gravity="bottom"
        >
        
         <Button
        android:id="@+id/button6"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button7"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
        <Button
        android:id="@+id/button8"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#EEEEEE"
        />
        
    </LinearLayout>

</LinearLayout>