android创建自定义dialog

android创建自定义搜索框dialog。本例主要包含2个Activity类和2个Layout xml文件

activity_main1.xml 主界面包含一行文字和一个Button，点击startdialog这个button就显示自定义的对话框。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="点击按钮显示自定义Dialog" />

    <Button
        android:id="@+id/startdialog"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Show Custom Dialog" >
    </Button>

</LinearLayout>

SearchMain.java

package com.example.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class SearchMain extends Activity
{

    private Button startDialogBtn;
    private static final int MY_CUSTOM_DIALOG = 0;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main1);
        startDialogBtn = (Button) findViewById(R.id.startdialog);
        startDialogBtn.setOnClickListener(new OnClickListener() {
            public void onClick(View v)
            {
                startCustomDialog();
            }
        });
    }

    /**
     * Starts an Activity which in this case is a custom dialog, as specified in
     * AndroidManifest.xml
     */
    private void startCustomDialog()
    {
        Intent intent = new Intent(this, SearchDialog.class);
        startActivityForResult(intent, MY_CUSTOM_DIALOG);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode)
        {
        case (MY_CUSTOM_DIALOG):
        {
            if (resultCode == Activity.RESULT_OK)
            {
                Log.d("ANDRO_DIALOG", "Coming back from the search dialog..");
                String searchQuery = data.getStringExtra(SearchDialog.SEARCH_QUERY_RESULT_FROM_DIALOG);
                Log.d("ANDRO_DIALOG", "Search query result: " + searchQuery);
                Toast.makeText(getApplicationContext(),searchQuery ,Toast.LENGTH_LONG).show();
            }
            break;
        }
        }
    }
}

activity_searchdialog.xml 搜索对话框布局文件 。包含一个EditText和2个Button

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
    android:id="@+id/layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dp" >

    <EditText
        android:id="@+id/search_query"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@android:drawable/bottom_bar"
        android:orientation="horizontal"
        android:paddingBottom="1.0dip"
        android:paddingLeft="4.0dip"
        android:paddingRight="4.0dip"
        android:paddingTop="5.0dip" >

        <Button
            android:id="@+id/search"
            android:layout_width="0.0dip"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:text="Search" />

        <Button
            android:id="@+id/cancel"
            android:layout_width="0.0dip"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:text="Cancel" />
    </LinearLayout>

</LinearLayout>

AndroidManifest.xml

部分：

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >


          <activity android:name=".SearchMain"
                  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="SearchDialog"
          android:label="Search Dialog"
          android:theme="@android:style/Theme.Dialog"/>
    </application>

点击主界面中的按钮后，弹出搜索对话框的效果图：