android 登陆界面
android 登陆界面
·
LoginActivity.java
package com.example.ruian;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class LoginActivity extends Activity {
private EditText m_txtUserName = null;
private EditText m_txtPwd = null;
private Button m_butLogin=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
findViews();
setListensers();
}
private void findViews(){
m_txtUserName=(EditText) findViewById(R.id.txtUserName);
m_txtPwd=(EditText) findViewById(R.id.txtPwd);
m_butLogin = (Button) findViewById(R.id.butLogin);
}
private void setListensers(){
//Login按钮
m_butLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
butLogin_OnClick(v);
}
});
}
private void butLogin_OnClick(View v){
//系统参数
SharedPreferences share = getSharedPreferences("perference",MODE_PRIVATE);
//登陆密码---------------------------------------------------------------
String strLoginPwd_value=share.getString("login_pwd_value","");
//m_txtPwd.setText(strLoginPwd_value);
if(strLoginPwd_value.equals("")==true){//为空则设初始值
strLoginPwd_value=getResources().getString(R.string.loginpwd_init);//默认登陆密码
}
String strLoginPwd=m_txtPwd.getText().toString();
if(strLoginPwd.equals(strLoginPwd_value)==true){
//登陆成功
//声明Intent对象,并启动 LoginActivity Activity
Intent intent = new Intent();
intent.setClass(LoginActivity.this, MainActivity.class);
startActivity(intent);
//从历史堆栈中删除当前Activity,用户点击“返回”按钮键时,不会再返回到这个Activity。
finish();
}
else{
openDialog("登陆密码错误!","消息");
}
}
//弹出对话框--------------------------------------------------
private void openDialog(String strMsg, String strTitle){
new AlertDialog.Builder(this)
.setTitle(strTitle)
.setMessage(strMsg)
.setPositiveButton("确认",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
})
.show();
}
//弹出确认、取消 对话框--------------------------------------------------
private void openDialogOk(String strMsg, String strTitle){
new AlertDialog.Builder(this)
.setTitle(strTitle)
.setMessage(strMsg)
.setPositiveButton("确认",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
openDialog("登陆密码错误!-----","消息");
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
openDialog("登陆密码错误!=====","消息");
}
})
.show();
}
}
activity_login.xml
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TableRow>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="20dip"
android:layout_weight="1"
android:text="用户登陆" />
</TableRow>
<TableRow>
<TextView
android:id="@+id/lblUserName"
android:layout_weight="1"
android:text="用户名:" />
</TableRow>
<TableRow>
<EditText
android:id="@+id/txtUserName"
android:layout_weight="1"
android:inputType="textPassword">
</EditText>
</TableRow>
<TableRow>
<TextView
android:id="@+id/lblPwd"
android:layout_weight="1"
android:text="密码:" />
</TableRow>
<TableRow>
<EditText
android:id="@+id/txtPwd"
android:layout_weight="1"
android:inputType="textPassword">
</EditText>
</TableRow>
<TableRow>
<Button
android:id="@+id/butLogin"
android:layout_weight="1"
android:text="登陆" />
</TableRow>
</TableLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="loginpwd_init">123456</string>
</resources>
最重要的一步,将此界面设置为启动页。
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ruian"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.ruian.LoginActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="ParaSetActivity"></activity>
<activity android:name="MainActivity"></activity>
</application>
</manifest>
说明:
android:name="com.example.ruian.LoginActivity" 这句中的 LoginActivity 即是设置初始界面为登陆页。
<activity android:name="ParaSetActivity"></activity> 这句是设置界面的activity
<activity android:name="MainActivity"></activity> 这句是主界面的activity
更多推荐
已为社区贡献1条内容
所有评论(0)