package com.example.qq2;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText madmin;
private EditText mpassword;
private Button mlogin;
private TextView mtextview;
/* (non-Javadoc)
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
madmin = (EditText) findViewById(R.id.admin);
mpassword = (EditText) findViewById(R.id.password);
mlogin = (Button) findViewById(R.id.login);
mtextview = (TextView) findViewById(R.id.textview);
//回显文本
readData();
mlogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
String admin = madmin.getText().toString();
String password = mpassword.getText().toString();
if(TextUtils.isEmpty(password)||TextUtils.isEmpty(admin)) {
Toast.makeText(MainActivity.this, "请填写正确信息", 0).show();
return;
}
// 保存登录数据 Ctrl+1生成下面的那个方法
saveData(admin,password);
/*将数据保存到手机里面-->文件系统-->将"账号#密码"写到文件里面去*/
}
});
}
// 回显文本
private void readData() {
// TODO Auto-generated method stub
SharedPreferences sp= getSharedPreferences("ppinfo", MODE_PRIVATE);
// defValues 如果找不到对应的值应该怎么办
String admin = sp.getString("admin","");
madmin.setText(admin);
String password = sp.getString("password","");
mpassword.setText(password);
}
private void saveData(String admin, String password) {
SharedPreferences sp= getSharedPreferences("ppinfo", MODE_PRIVATE);
Editor edit = sp.edit();
edit.putString("admin", admin);
edit.putString("password", password);
// 提交
edit.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
<LinearLayout 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:background="#e7e7e7"
android:orientation="vertical"
tools:context="com.example.qq2.MainActivity" >
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
android:background="@drawable/qq"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
>
<TextView
android:layout_width="0dp"
android:layout_height="40dp"
android:text="账号:"
android:textSize="20dp"
android:layout_weight="1"/>
<EditText
android:id="@+id/admin"
android:layout_width="0dp"
android:layout_height="40dp"
android:hint="账号"
android:textSize="20dp"
android:layout_weight="4"
android:background="#ffffff"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="20dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
>
<TextView
android:layout_width="0dp"
android:layout_height="40dp"
android:text="密码:"
android:textSize="20dp"
android:layout_weight="1"/>
<EditText
android:id="@+id/password"
android:layout_width="0dp"
android:layout_height="40dp"
android:hint="密码"
android:textSize="20dp"
android:layout_weight="4"
android:background="#ffffff"
android:inputType="textPassword"
/>
</LinearLayout>
<Button
android:id="@+id/login"
android:layout_width="120dp"
android:layout_height="50dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:background="@drawable/bg_selector"
android:text="登录"/>
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:textSize="20dp"
/>
</LinearLayout>