Android studio自动登陆问题

Question

public class MainActivity extends AppCompatActivity {
    SharedPreferences sp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         sp = getSharedPreferences("userInfo", Context.MODE_WORLD_READABLE);
         EditText ed = findViewById(R.id.et_user_name);
         EditText ed1 = findViewById(R.id.et_psw);
        Button btn = findViewById(R.id.btn_login);
       final CheckBox  rem=(CheckBox) findViewById(R.id.cb_mima);
        CheckBox  auto=(CheckBox) findViewById(R.id.cb_auto);  if (rem.isChecked()) {            ed.setText(sp.getString("username", ""));
            ed1.setText(sp.getString("password", ""));           if (auto.isChecked()) {               Intent intent11 =new Intent(MainActivity.this,Main3Activity.class);
                        startActivity(intent11);
            }      }
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {                String username = ((EditText)findViewById(R.id.et_user_name)).getText().toString();
                String pwd = ((EditText)findViewById(R.id.et_psw)).getText().toString();                if (username.equals("陈同学")&&pwd.equals("19970601")){
                    Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                   /*if (rem.isChecked()) {
                     SharedPreferences.Editor editor=sp.edit();
                        editor.putString("username", username);
                        editor.putString("password", pwd);
                       editor.commit();                    }*/
                    Intent intent22 =new Intent(MainActivity.this,Main3Activity.class);
                    startActivity(intent22);
                }
                else{
                    Toast.makeText(MainActivity.this, "用户名密码错误", Toast.LENGTH_SHORT).show();
                }           }       });
   }无错误，但闪退，不知道什么原因

Answer 1

把logcat贴出来看看。

Answer 2

public class MainActivity extends Activity {
EditText ed,ed1;
    SharedPreferences sp;
    Button btn;
    CheckBox  rem,auto;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         sp = getSharedPreferences("userInfo", Context.MODE_WORLD_READABLE);
         ed = (EditText)findViewById(R.id.et_user_name);
         ed1 =(EditText) findViewById(R.id.et_psw);
        btn = (Button)findViewById(R.id.btn_login);
       rem=(CheckBox) findViewById(R.id.cb_mima);
        auto=(CheckBox) findViewById(R.id.cb_auto);
try {
  if (rem.isChecked()) {            ed.setText(sp.getString("username", ""));
            ed1.setText(sp.getString("password", ""));           if (auto.isChecked()) {               Intent intent11 =new Intent(MainActivity.this,Main3Activity.class);
                        startActivity(intent11);
            }      }
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {                String username =ed.getText().toString();
                String pwd =ed1.getText().toString();                if (username.equals("陈同学")&&pwd.equals("19970601")){
                    Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                   if (rem.isChecked()) {
                     SharedPreferences.Editor editor=sp.edit();
                        editor.putString("username", username);
                        editor.putString("password", pwd);
                       editor.commit();                    }
                    Intent intent22 =new Intent(MainActivity.this,Main3Activity.class);
                    startActivity(intent22);
                }
                else{
                    Toast.makeText(MainActivity.this, "用户名密码错误", Toast.LENGTH_SHORT).show();
                }           }       });
}
catch (Exception e)
{
    Toast.makeText(getApplication(),e.toString() ,Toast.LENGTH_LONG).show();
}
   }
}  
没崩溃啊

Answer 3

参考这个https://bbs.csdn.net/topics/392456107

Answer 4

是否在登录界面就调用了WIFI相关功能 却没有动态开启 wifi 网络权限