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>