渲染代码

MainActivity

package com.example.sharedpreferece;import android.app.Activity;import android.app.ActionBar;import android.app.Fragment;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.widget.CheckBox;import android.widget.EditText;import android.widget.Toast;import android.os.Build;public class MainActivity extends Activity {	EditText username;	EditText password;	CheckBox ck;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		username = (EditText) findViewById(R.id.username);		password = (EditText) findViewById(R.id.password);		ck = (CheckBox) findViewById(R.id.ck);		SharedPreferences sp = getSharedPreferences("config", MODE_PRIVATE);		String name = sp.getString("name", "");//第二个参数默认值		String pass = sp.getString("pass", "");		username.setText(name);		password.setText(pass);	}		public void login(View v)	{		String name = username.getText().toString().trim();		String pass = password.getText().toString().trim();		if ("test".equals(name) && "123".equals(pass)) {			if (ck.isChecked()) {				SharedPreferences sp = this.getSharedPreferences("config", MODE_PRIVATE);				 Editor et = sp.edit();				 et.putString("name", name);				 et.putString("pass", pass);				 et.commit();				 Toast.makeText(this, "登录成功且写入配置成功", Toast.LENGTH_SHORT).show();			} else {				Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();			}		} else {			Toast.makeText(this, "用戶名或密碼粗無", Toast.LENGTH_SHORT).show();		}	}	}