标签:android开发
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/input_name" />
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/input_name" />
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/input_age" />
<EditText android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:numeric="integer"
android:id="@+id/input_age" />
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_save"
android:onClick="save"
android:id="@+id/button_save"/>
</LinearLayout> <string name="input_name">姓名</string>
<string name="input_age">年龄</string>
<string name="button_save">保存参数</string>
<string name="success">保存成功</string>
<string name="fail">保存失败</string>
private EditText nameText;
private EditText ageText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nameText = (EditText)this.findViewById(R.id.input_name);
ageText = (EditText)this.findViewById(R.id.input_age);
// 读取保存的值
//SharedPreferences preferences = this.getPreferences(Context.MODE_PRIVATE);// 默认使用类名作为文件名称
//SharedPreferences preferences = this.getSharedPreferences("preference", Context.MODE_PRIVATE);
SharedPreferences preferences = getApplicationContext().getSharedPreferences("preference", Context.MODE_PRIVATE);
String name = preferences.getString("name", "空");
String age = String.valueOf(preferences.getInt("age", 0));
nameText.setText(name);
ageText.setText(age);
}
public void save(View v){
String name = nameText.getText().toString();
Integer age = Integer.valueOf( ageText.getText().toString() );
try{
// 第一个参数为文件名称,不能指定后缀名,第二个参数为文件操作模式
SharedPreferences preferences = getApplicationContext().getSharedPreferences("preference", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("name", name);
editor.putInt("age", age);
editor.commit();
Toast.makeText(getApplicationContext(),R.string.success, Toast.LENGTH_LONG).show();
}
catch (Exception e){
Toast.makeText(getApplicationContext(),R.string.fail, Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}第一次运行结果如图:
输入内容,点击保存参数按钮,退出程序,再次打开,如图:
android小功能实现之简单数据持久化保存(SharedPreferences)
标签:android开发
原文地址:http://blog.csdn.net/xufeng0991/article/details/44064081