package com.example.demo01;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText et1;
private EditText et2;
private Button bu1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1111);
et1 = (EditText) findViewById(R.id.et1);
et2 = (EditText) findViewById(R.id.et2);
bu1 = (Button) findViewById(R.id.bu1);
Map<String, String> userInfo = SPSaveQQ.getUserInfo(this);
if (userInfo != null) {
et1.setText(userInfo.get("account"));
et2.setText(userInfo.get("passeord"));
}
}
public void Click(View view) {
// Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT);
switch (view.getId()) {
case R.id.bu1:
String account = et1.getText().toString().trim();
String password = et2.getText().toString();
if (TextUtils.isEmpty(account)) {
Toast.makeText(MainActivity.this, "请输入QQ账号", Toast.LENGTH_SHORT)
.show();
return;
}
if (TextUtils.isEmpty(password)) {
Toast.makeText(MainActivity.this, "请输入密码", Toast.LENGTH_SHORT).show();
return;
}
Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
boolean isSaveSuccee = SPSaveQQ.saveUserInfo(MainActivity.this,
account, password);
if (isSaveSuccee) {
Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "保存失败", Toast.LENGTH_SHORT).show();
}
break;
default:
break;
}
}
}
package com.example.demo01;
import android.support.v7.app.ActionBarActivity;
import java.util.HashMap;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class SPSaveQQ extends Activity{
/**
* 保存数据
*
* @param context
* @param account
* @param password
* @return
*/
public static boolean saveUserInfo(Context context, String account,
String password) {
SharedPreferences sp = context.getSharedPreferences("data",Context.MODE_PRIVATE);
SharedPreferences.Editor edit = sp.edit();
edit.putString("userName", account);
edit.putString("pwd", password);
edit.commit();
return true;
}
public static Map<String, String> getUserInfo(Context context) {
SharedPreferences sp = context.getSharedPreferences("data", Context.MODE_PRIVATE);
String account = sp.getString("userName", null);
String password = sp.getString("pwd", null);
Map<String,String> userMap = new HashMap<String, String>();
userMap.put("account", account);
userMap.put("passeord", password);
return userMap;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.homework2.MainActivity" >
<TextView
android:id="@+id/tv1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="90dp"
android:text="账号"
android:textSize="30sp"
android:background="#FFFFFF"
/>
<EditText
android:id="@+id/et1"
android:layout_width="200sp"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/tv1"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/tv1"
android:layout_toRightOf="@+id/tv1"
android:phoneNumber="true"
android:background="#FFFFFF"
android:textSize="20sp" >
</EditText>
<TextView
android:id="@+id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="140sp"
android:text="密码"
android:textSize="30sp"
android:background="#FFFFFF"
/>
<EditText
android:id="@+id/et2"
android:layout_width="200sp"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/tv2"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/tv2"
android:layout_toRightOf="@+id/tv2"
android:password="true"
android:background="#FFFFFF"
android:textSize="20sp" >
</EditText>
<TextView
android:id="@+id/tv3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/bt1"
android:layout_centerHorizontal="true"
android:layout_marginTop="98dp"
android:textSize="30sp" />
<ImageView
android:layout_width="45sp"
android:layout_height="45sp"
android:layout_above="@+id/et1"
android:layout_centerHorizontal="true"
android:src="@drawable/picture"
android:layout_marginBottom="18dp" />
<Button
android:id="@+id/bu1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tv2"
android:layout_below="@+id/tv2"
android:layout_marginTop="69dp"
android:background="#63B8FF"
android:onClick="Click"
android:text="登录"
android:textSize="30sp" />
</RelativeLayout>
![](https://img2018.cnblogs.com/blog/1785784/201910/1785784-20191030183251404-1386387129.png)
![](https://img2018.cnblogs.com/blog/1785784/201910/1785784-20191030183258409-1255467749.png)