Android系列之实现自动登录和记住密码

r囧r小猫 2021-09-10 16:46 854阅读 0赞

记住密码和自动登录是很多手机软件都有的一个功能。可以用 SharedPreferences类来轻松实现。 SharedPreferences是安卓平台的一个轻量级类。采用 SharedPreferences进行数据存储是很方便的。

public class LoginCheckActivity extends Activity implements OnClickListener{
    	//登录按钮
    	private Button loginButton;
    	
    	//账号文本框
    	private EditText accountEditText;
    	//密码文本框
    	private EditText passwordEditText;
    	
    	//账号
    	private String account;
    	//密码
    	private String password;
    	
    	private String accountValue;
    	private String passwordValue;
    		
    	//进度条
    	private ProgressDialog pd = null;
    	
    	//记住账号的CheckBox
    	private CheckBox savedAccountCheckBox;
    	//自动登录的CheckBox
    	private CheckBox autoLoginCheckBox;
    	
    	//SharePreferences对象，用于记住账号
    	private SharedPreferences sp;
    	
    	//记住账号的标志常数
    	private final String MAK = "innoview";
    	
    	
    	@SuppressWarnings("deprecation")
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		//设置标题不显示
    		requestWindowFeature(Window.FEATURE_NO_TITLE);
    		setContentView(R.layout.login);
    		
    		//账号的文本框
    		accountEditText = (EditText)this.findViewById(R.id.et_account);
    		//密码的文本框
    		passwordEditText = (EditText)this.findViewById(R.id.et_password);
    		//保存账号的CheckBox
    		savedAccountCheckBox = (CheckBox)findViewById(R.id.cb_savedAccount);
    		//自动登录的CheckBox
    		autoLoginCheckBox = (CheckBox)findViewById(R.id.cb_autoLogin);
    		//获取保存在SharePreferences里面的账号信息，实现自动登录
    		sp = getSharedPreferences("accountInfo",Context.MODE_WORLD_READABLE);
    		
    		if(sp.getBoolean("ISCHECK", false)){
    			
    			savedAccountCheckBox.setChecked(true);
    			
    			try{
    				 accountValue = sp.getString("ACCOUNTVALUE","");
    				 System.out.println("<<<<<<<<<<<<"+"账号"+accountValue);
    			}catch (Exception e) {
    				// TODO: handle exception
    			}
    			
    			accountEditText.setText(account);
    			
    			try{
    				 passwordValue = sp.getString("PASSWORDVALUE","");
    				 System.out.println("<<<<<<<<<<<<"+"密码"+passwordValue);
                
    			}catch (Exception e) {
    				// TODO: handle exception
    			}
    			
    			passwordEditText.setText(password);
    			
    			if(sp.getBoolean("AUTO_ISCHECK", false)){
    				 autoLoginCheckBox.setChecked(true);
    				 initLogin();
    		    }
    			
    		}
    		
    		savedAccountCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
    			public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
    			if (savedAccountCheckBox.isChecked()) {
    			                     
    				System.out.println("记住账号框未选中状态");
    				sp.edit().putBoolean("ISCHECK", true).commit();
    
    			}else {
    
    				System.out.println("记住账号框未选中");
    				sp.edit().putBoolean("ISCHECK", false).commit();
    
    			}
    
    			}
    		});
    		
    		autoLoginCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
    	        public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
    	        	if (autoLoginCheckBox.isChecked()) {
    	        		System.out.println("自动登录功能以启用");
    	        		sp.edit().putBoolean("AUTO_ISCHECK", true).commit();
    
    	        	} else {
    	        		System.out.println("自动登录已关闭");
    	        		sp.edit().putBoolean("AUTO_ISCHECK", false).commit();
    	        	}
    	        }
    		});
    		
    		
    		loginButton = (Button)findViewById(R.id.bt_login);
    		loginButton.setOnClickListener(this);
    		
    	}
    	
    	/**
    	 * 重载的按钮点击事件
    	 */
    	@Override
    	public void onClick(View v) {
    
    		switch (v.getId()) {
    		case R.id.bt_login:
    			initLogin();
    			break;
    		default:
    			break;
    		}
    	}   
    	
    	public void initLogin(){
    		//显示进度条
    		pd = new ProgressDialog(this);
    		pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
    		pd.setMessage("数据加载...");
    		pd.show();
    		
    		account = accountEditText.getText().toString();
    		password = passwordEditText.getText().toString();
    		
    		if(savedAccountCheckBox.isChecked())
    		{
    		 
    		 Editor editor = sp.edit();
    
    		    try {
    	            editor.putString("ACCOUNTVALUE", account);
    		        System.out.println("<<<<<<<<"+"账号"+account);
    		    } catch (Exception e) {
    		        Toast.makeText(LoginCheckActivity.this,"账号保存异常",Toast.LENGTH_SHORT).show();
    		        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    		    }
    		    
    		    try {
    	                 editor.putString("PASSWORDVALUE", password);
    		        System.out.println("<<<<<<<<"+"密码"+password));
    		    } catch (Exception e) {
    		        Toast.makeText(LoginCheckActivity.this,"密码保存异常",Toast.LENGTH_SHORT).show();
    		        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    		    }
    		    
    		   editor.commit();
    		}
    
    		
    		loginCheck(account, password);
    	}
    	
    	
    	/**
    	 * 登录验证
    	 * @param account 账号(学号)
    	 * @param password 密码
    	 */
    	public void loginCheck(String account, String password){
    		
    		if(account.equals("admin")&&password.equals("123")){
    			Intent intent = new Intent(LoginCheckActivity.this,MainActivity.class);
    			startActivity(intent);
    			LoginCheckActivity.this.finish();
    		}
    
    	}                                                                                                                         }