代码清单7-14 监听CheckBox的变化

package com.bignerdranch.android.criminallntent;


import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;

public class CrimeFragment extends Fragment {
    private Crime mCrime;
    private EditText mTitleField;
    private Button mDateButton;
    private CheckBox mSolvedCheckBox;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mCrime = new Crime();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_crime, container, false);

        mTitleField=(EditText)v.findViewById(R.id.crime_title);
        mTitleField.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged (
                    CharSequence s,int start, int count, int after){
                    //this space intentionally left blank
                }

            @Override
            public void onTextChanged (
                CharSequence s,int start, int before, int count){
                mCrime.setTitle(s.toString());
            }

            @Override
            public void afterTextChanged (Editable s){
                //This one too
            }
        });

        mDateButton=(Button)v.findViewById(R.id.crime_date);
        mDateButton.setText(mCrime.getDate().toString());
        mDateButton.setEnabled(false);
        
        mSolvedCheckBox=(CheckBox)v.findViewById(R.id.crime_solved);
        mSolvedCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton ButtonView,boolean isChecked) {
                mCrime.setSolved(isChecked);
            }
        });
        
        return v;
    }
}