android中SharedPreferences的实例

第六课，SharedPreferences的讲解，SharedPreferences是以xml文件来进行存储的，在手机应用中很多设置文件的存储就是使用SharedPreferences实现的。
package com.myclover.sharedpreferences;import android.app.Activity;import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.EditText;import android.widget.RadioButton;public class SharedPreferencesActivity extends Activity {private static final String TAG = "SharedPreferencesActivity";private EditText name;private EditText age;private EditText amount;private static String sex;private RadioButton male;private RadioButton female;@Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                name = (EditText)findViewById(R.id.name);        age = (EditText)findViewById(R.id.age);        amount = (EditText)findViewById(R.id.amount);        male = (RadioButton)findViewById(R.id.male);        female = (RadioButton)findViewById(R.id.female);        Button save = (Button)findViewById(R.id.save);        Button query = (Button)findViewById(R.id.query);        RadioButton male = (RadioButton)findViewById(R.id.male);        RadioButton female = (RadioButton)findViewById(R.id.female);        save.setOnClickListener(listener);        query.setOnClickListener(listener);        male.setOnCheckedChangeListener(changeListsner);        female.setOnCheckedChangeListener(changeListsner);    }private View.OnClickListener listener = new View.OnClickListener() {@Overridepublic void onClick(View v) {Button bid = (Button)v;//文件所在的路径/data/data/com.myclover.sharedpreferences/shared_prefs///执行该行代码默认在应用中创建一个以myclover命名的一个xml文件，myclover.xml//android底层是使用Pull技术把内容保存到XML文件中，为了确保全部内容都保存成功，所以最后需要调用commit方法进行提交SharedPreferences sp = SharedPreferencesActivity.this.getSharedPreferences("myclover", Context.MODE_PRIVATE);//执行该行代码默认在应用中创建一个以activity名称命名的一个xml文件，SharedPreferencesActivity.xml//SharedPreferences sp = SharedPreferencesActivity.this.getPreferences(Context.MODE_APPEND);Log.i(TAG, "click id = " + bid.getId());switch (bid.getId()) {case R.id.save:String inName = name.getText().toString();String inAge = age.getText().toString();String inAmount = amount.getText().toString();Editor edit = sp.edit();edit.putString("name", inName);edit.putString("sex", sex);edit.putInt("age", Integer.parseInt(inAge));edit.putLong("amount", Long.parseLong(inAmount));edit.commit();break;case R.id.query:name.setText(sp.getString("name", "myclover"));age.setText(String.valueOf(sp.getInt("age", 24)));amount.setText(String.valueOf(sp.getLong("amount", 10000)));if("male".equals(sp.getString("sex", "male"))){male.setChecked(true);female.setChecked(false);}else{male.setChecked(false);female.setChecked(true);}break;}}};private OnCheckedChangeListener changeListsner = new OnCheckedChangeListener()    {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {RadioButton rid = (RadioButton)buttonView;Log.i(TAG, "change rid = " + rid.getId());switch (rid.getId()) {case R.id.male:if(isChecked){male.setChecked(true);female.setChecked(false);sex = "male";}else{male.setChecked(false);}break;case R.id.female:if(isChecked){male.setChecked(false);female.setChecked(true);sex = "female";}else{female.setChecked(false);}break;}}    };}
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