Android_数据管理系统登陆界面设计及代码

layout:main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/background"
    android:orientation="vertical"
    android:paddingBottom="50dp"
    android:paddingLeft="20dp"
    android:paddingRight="20dp"
    android:paddingTop="50dp" >

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center" >

        <TableRow>

            <TextView
                android:id="@+id/txt_id"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:text="@string/label_id"
                android:textColor="@color/word" />

            <EditText
                android:id="@+id/edt_id"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:bufferType="editable"
                android:inputType="none"
                android:singleLine="true" >

                <requestFocus />
            </EditText>
        </TableRow>

        <TableRow>

            <TextView
                android:id="@+id/txt_pass"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_pass"
                android:textColor="@color/word" />

            <EditText
                android:id="@+id/edt_pass"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:cursorVisible="false"
                android:inputType="textPassword"
                android:singleLine="true" >
                
            </EditText>
        </TableRow>
    </TableLayout>

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="30dp"
        android:paddingRight="30dp" >

        <Button
            android:id="@+id/btn_login"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/label_login" />

        <Button
            android:id="@+id/btn_clear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/label_clear" />
    </LinearLayout>

</LinearLayout>

　　layout-land:main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/background"
    android:orientation="vertical"
    android:paddingBottom="50dp"
    android:paddingLeft="100dp"
    android:paddingRight="100dp"
    android:paddingTop="50dp" >

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center" >

        <TableRow>

            <TextView
                android:id="@+id/txt_id"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:text="@string/label_id"
                android:textColor="@color/word" />

            <EditText
                android:id="@+id/edt_id"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:bufferType="editable"
                android:inputType="none"
                android:singleLine="true" >

                <requestFocus />
            </EditText>
        </TableRow>

        <TableRow>

            <TextView
                android:id="@+id/txt_pass"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/label_pass"
                android:textColor="@color/word" />

            <EditText
                android:id="@+id/edt_pass"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:cursorVisible="false"
                android:inputType="textPassword"
                android:singleLine="true" >
                
            </EditText>
        </TableRow>
    </TableLayout>

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="50dp"
        android:paddingRight="50dp" >

        <Button
            android:id="@+id/btn_login"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/label_login" />

        <Button
            android:id="@+id/btn_clear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/label_clear" />
    </LinearLayout>

</LinearLayout>

　　values:colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="background">#abc</color>
    <color name="word">#ff000000</color>
    
</resources>

　　values:strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="hello">Hello World, LoginActivity!</string>
    <string name="app_name">数据管理系统</string>
    <string name="label_id">工号</string>
	<string name="label_pass">密码</string>
	<string name="label_hint_id">在此输入工号</string>
	<string name="label_hint_pass">在此输入密码</string>
	<string name="label_login">登陆</string>
	<string name="label_clear">清空</string>
	
</resources>

　　LoginActivity.java

package tomy.test.dms;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		Button btn_login = (Button) findViewById(R.id.btn_login);
		//登陆
		btn_login.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				String s_edt_id = ((EditText)findViewById(R.id.edt_id)).getText().toString();
				String s_edt_pass = ((EditText)findViewById(R.id.edt_pass)).getText().toString();
				if(s_edt_id.length()<1 || s_edt_pass.length()<1)
				{
					//Toast.makeText(getApplicationContext(), "请先输入工号和密码！",Toast.LENGTH_SHORT).show();
					if(s_edt_id.length()<1)
					{
						EditText eText=(EditText)findViewById(R.id.edt_id);
						eText.setHint(R.string.label_hint_id);
					}
					if(s_edt_pass.length()<1)
					{
						EditText eText=(EditText)findViewById(R.id.edt_pass);
						eText.setHint(R.string.label_hint_pass);
					}
				}
				else 
				{					
					String toast_success = "登陆成功！";
					Toast.makeText(getApplicationContext(), toast_success, Toast.LENGTH_SHORT).show();
					String toast = "你输入的用户名是:" + s_edt_id + "密码是:" + s_edt_pass;
					Toast.makeText(getApplicationContext(), toast,Toast.LENGTH_LONG).show();
				}
			}
		});
		//清空编辑框
		Button btn_clear = (Button) findViewById(R.id.btn_clear);
		btn_clear.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				EditText edt_id = (EditText) findViewById(R.id.edt_id);
				EditText edt_pass = (EditText) findViewById(R.id.edt_pass);
				edt_id.setHint(null);
				edt_pass.setHint(null);
				edt_id.setText(null);
				edt_pass.setText(null);
				edt_id.requestFocus();
			}
		});
	}
}