我同意条款CheckBox的isChecked属性

package com.wzc.ex04;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    public TextView mTextView1,mTextView2;
    public CheckBox mCheckBox1;
    public Button mButton1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTextView1 = (TextView) findViewById(R.id.tv_01);
        mTextView2 = (TextView) findViewById(R.id.textView2);
        mCheckBox1 = (CheckBox) findViewById(R.id.checkBox);
        mButton1 = (Button) findViewById(R.id.bt_01);

        /*将CheckBox、Button默认为未选择状态*/
        mCheckBox1.setOnClickListener(new CheckBox.OnClickListener(){
            @Override
            public void onClick(View view) {
                if (mCheckBox1.isChecked()){
                    mButton1.setEnabled(true);
                    mTextView1.setText(R.string.text1);
                    mTextView2.setText("");
                }
                else {
                    mButton1.setEnabled(false);
                    mTextView1.setText(" ");
                    mTextView2.setText(R.string.no);
                }
            }
        });
        mButton1.setOnClickListener(new Button.OnClickListener(){
            @Override
            public void onClick(View view) {
                Toast.makeText(
                        MainActivity.this,
                        "请同意",
                        Toast.LENGTH_LONG
                ).show();
            }
        });

    }
}