简单的很 直接看代码
private EditText name,pass;
private CheckBox mJi;
private CheckBox mDeng;
name = findViewById(R.id.mName);
pass = findViewById(R.id.mPass);
mJi = findViewById(R.id.mCheckJi);
mDeng = findViewById(R.id.mCheckDeng);
//初始化SharedPreferences
sharedPreferences = getSharedPreferences("Login", MODE_APPEND);
edit = sharedPreferences.edit();
//记住密码 设置一个状态值true/false
boolean rememberPwd = sharedPreferences.getBoolean("rememberPwd", false);
if (rememberPwd){//如果为true
String names = sharedPreferences.getString("names", null);
String passs = sharedPreferences.getString("passs", null);
name.setText(names);
pass.setText(passs);
mJi.setChecked(true);
}else{
mJi.setChecked(false);
}
//记住密码
mJi.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (mJi.isChecked()) {//如果选中
String names = name.getText().toString();
String passs = pass.getText().toString();
Log.i("AA", "选中"+names);
edit.putString("names",names);
edit.putString("passs",passs);
edit.putBoolean("rememberPwd",true);
edit.commit();
}else if(!mJi.isChecked()){//如果不选中
edit.clear();//清空已记住的sharedPreferences
edit.commit();
}
}
});
//自动登录状态判断 设置一个状态值true/false
boolean zhuang = sharedPreferences.getBoolean("zhuang", false);
if (zhuang){//跳转
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
//自动登录
mDeng.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (mDeng.isChecked()) {//如果选中
edit.putBoolean("zhuang",true);//给状态值为true
edit.commit();//提交
}
}
});