不规范，了解下SharedPreferences的使用就好
// java
package com.example.administrator.myapplication02;
//包名得改
import android.content.SharedPreferences;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class HandleActivity extends AppCompatActivity {
private static final int zc_ok=1;
private static final int zc_exist=2;
private static final int login_ok=3;
private static final int login_noExist=4;
private static final int login_error=5;
EditText tv1;
EditText tv2;
TextView tv3;
SharedPreferences sharedPreferences;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what)
{
case zc_ok:
tv3.setText("注册：OK");
break;
case zc_exist:
tv3.setText("注册：已存在");
break;
case login_ok:
tv3.setText("登录：OK");
break;
case login_noExist:
tv3.setText("登录：没注册");
break;
case login_error:
tv3.setText("登录：密码错误");
break;
}
}
};
private class MyThread extends Thread {
@Override
public void run() {
Message message=new Message();
String b1=sharedPreferences.getString(tv1.getText().toString(),"no");
if(b1.equals("no")) {
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putString(tv1.getText().toString(),tv2.getText().toString());
editor.commit();
message.what=zc_ok;
handler.sendMessage(message);
}
else {
message.what = zc_exist;
handler.sendMessage(message);
}
}
}
private class MyThread2 extends Thread {
@Override
public void run() {
Message message=new Message();
String b1=sharedPreferences.getString(tv1.getText().toString(),"no");
if(b1.equals("no"))
{
message.what=login_noExist;
handler.sendMessage(message);
}
else if(b1.equals(tv2.getText().toString() ))
{
message.what=login_ok;
handler.sendMessage(message);
}
else{
message.what=login_error;
handler.sendMessage(message);
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_handle);
tv1=(EditText) findViewById(R.id.editText1);
tv2=(EditText) findViewById(R.id.editText2);
tv3=(TextView) findViewById(R.id.textView3);
sharedPreferences=getSharedPreferences("myfile",0);
}
public void a2(View view) {
new MyThread2().start();
}
public void a3(View view) {
new MyThread().start();
}
}
// xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="28dp"
android:onClick="a2"
android:text="登录"
app:layout_constraintStart_toEndOf="@+id/editText2"
app:layout_constraintTop_toBottomOf="@+id/button3" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="36dp"
android:onClick="a3"
android:text="注册"
app:layout_constraintStart_toEndOf="@+id/editText1"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="36dp"
android:ems="10"
android:hint="用户名"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="32dp"
android:ems="10"
android:hint="密码"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText1" />
<TextView
android:id="@+id/textView3"
android:layout_width="212dp"
android:layout_height="44dp"
android:layout_marginLeft="96dp"
android:layout_marginStart="96dp"
android:layout_marginTop="80dp"
android:text="结果"
android:textAllCaps="false"
android:textSize="24sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText2" />
</android.support.constraint.ConstraintLayout>