android 他们定义对话框

创建一个布局文件 my_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="4dp"
        android:text="@string/textView1"
        />

    <EditText
        android:id="@+id/editText_user"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="4dp"
        />

     <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
   		android:layout_alignLeft="@+id/editText_user"
        android:layout_below="@+id/editText_user"
        android:layout_marginTop="7dp"
        android:text="@string/textView2"
        />

    <EditText
        android:id="@+id/editText_pwd"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_marginTop="4dp"
        android:layout_below="@+id/textView2"
        />
</RelativeLayout>

下面是strings.xml文件：

<?

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

    <string name="app_name">demo091801</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>

    <string name="MyDialog">自己定义对话框</string>
    <string name="textView1">username</string>

    <string name="textView2">password</string>

</resources>

在主activity_main.xml中加入一个button控件，当单击此button时即弹出自己定义的对话框：

<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=".MainActivity" >

  <Button
      android:id="@+id/My_Dialog"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:text="@string/MyDialog"
      />
</RelativeLayout>

图形界面例如以下：

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在MainActivity.java代码中为button控件设置单击事件监听，并弹出自己定义的对话框：

MainActivity.java:

package com.example.demo091801;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		Button btn1 = (Button)findViewById(R.id.My_Dialog);

		btn1.setOnClickListener(new OnClickListener()
		{

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub

				AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
				LayoutInflater inflater = getLayoutInflater();
				View view = inflater.inflate(R.layout.my_dialog, null);

				builder.setTitle("登陆");
				builder.setView(view);
				builder.setPositiveButton("登陆", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface arg0, int arg1) {
						// TODO Auto-generated method stub

					}
				});

				builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface arg0, int arg1) {
						// TODO Auto-generated method stub

					}
				});

				AlertDialog dialog = builder.create();
				dialog.show();

			}
		}
				);

	}

	@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;
	}

}

作者：http://blog.csdn.net/lp310018931

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