SharedPreferences實現記住密碼----自動登入功能

package com.example.day_09;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText edit_name,edit_pass;
	private CheckBox check_remember,check_motion;
	private Button button;
	private SharedPreferences sharedPreferences;
	private Editor editor;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		//獲取資源id
		findViewById();
		//
		sharedPreferences=getSharedPreferences("user", MODE_PRIVATE);
		editor=sharedPreferences.edit();
		//取出記住密碼的狀態值
		boolean r_ischeck = sharedPreferences.getBoolean("r_ischeck", false);
		//判斷是否為選中
		if (r_ischeck) {
			String name = sharedPreferences.getString("name", null);
			String pass = sharedPreferences.getString("pass", null);
			//賦值
			edit_name.setText(name);
			edit_pass.setText(pass);
			check_remember.setChecked(true);
		}
		//取出自動登入的狀態值
		boolean v_ischecked = sharedPreferences.getBoolean("v_ischecked", false);
		if (v_ischecked) {
			
			Intent intent = new  Intent(MainActivity.this, LoginAction.class);
			startActivity(intent);
			//銷燬
			finish();
		}
		//點選自動登入監聽
		check_motion.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				if (isChecked) {
					check_remember.setChecked(true);
				}else{
					check_remember.setChecked(false);
				}
			}
		});
		//點選button監聽
		button.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				String name=edit_name.getText().toString();
				String pass = edit_pass.getText().toString();
				
				//判斷記住密碼是否勾選
				if (check_remember.isChecked()) {
					
					//存值
					editor.putString("name", name);
					editor.putString("pass", pass);
					editor.putBoolean("r_ischeck", true);
					//提交
					editor.commit();
					
				}else{
					//登出
					editor.clear();
					//提交
					editor.commit();
				}
				//判斷自動登入是否勾選
				if (check_motion.isChecked()) {
					editor.putBoolean("v_ischecked", true);
					//提交
					editor.commit();
				}
				//判斷不為空
				if (name.equals("")&&pass.equals("")) {
					Toast.makeText(MainActivity.this, "使用者名稱和密碼不能為空", 1).show();
				}else{
					//跳轉
					Intent intent = new Intent(MainActivity.this, LoginAction.class);
					startActivity(intent);
					//銷燬
					finish();
				}
				
			}
		});
		
	}
	//獲取資源id
	public void findViewById(){
		edit_name=(EditText) findViewById(R.id.edit_name);
		edit_pass=(EditText) findViewById(R.id.edit_pass);
		check_remember=(CheckBox) findViewById(R.id.check_remember);
		check_motion=(CheckBox) findViewById(R.id.check_motion);
		button=(Button) findViewById(R.id.button1);
	}
	

}