Android入门第九篇之AlertDialog
时隔一年,又要准备做Android的开发了,最近复习和整理一下Android的知识。这次要说的是AlertDialog,这种对话框会经常遇到。AlertDialog跟WIN32开发中的Dialog不一样,AlertDialog是非阻塞的,而阻塞的对话框用的是PopupWindow。
先贴出程序运行的截图:
main.xml的源码:
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:id="@+id/Button01" android:layout_height="wrap_content" android:text="非Layout型对话框" android:layout_width="fill_parent"></Button>
<Button android:id="@+id/Button02" android:layout_height="wrap_content" android:text="Layout型对话框" android:layout_width="fill_parent"></Button><View android:id="@+id/View01" android:layout_width="wrap_content" android:layout_height="wrap_content"></View>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
><Button android:id="@+id/Button01" android:layout_height="wrap_content" android:text="非Layout型对话框" android:layout_width="fill_parent"></Button>
<Button android:id="@+id/Button02" android:layout_height="wrap_content" android:text="Layout型对话框" android:layout_width="fill_parent"></Button><View android:id="@+id/View01" android:layout_width="wrap_content" android:layout_height="wrap_content"></View></LinearLayout>
下图是非Layout型对话框,直接使用AlertDialog
下图是使用了Layout的对话框,可以自定义控件,实现更复杂的对话框
dialoglayout.xml的源码:
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<?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="wrap_content"
android:orientation="vertical">
<EditText android:layout_height="wrap_content"
android:layout_width="fill_parent" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:textAppearance="?android:attr/textAppearanceMedium" android:id="@+id/edtInput"/>
</LinearLayout>
<?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="wrap_content"
android:orientation="vertical">
<EditText android:layout_height="wrap_content"
android:layout_width="fill_parent" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:textAppearance="?android:attr/textAppearanceMedium" android:id="@+id/edtInput"/>
</LinearLayout>程序源码:
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package com.testAlertDialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInte易做图ce;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
public class testAlertDialog extends Activity {
Button btnShowDialog;
Button btnShowDialog_Layout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//定义按钮
btnShowDialog=(Button)this.findViewById(R.id.Button01);
btnShowDialog.setOnClickListener(new ClickEvent());
btnShowDialog_Layout=(Button)this.findViewById(R.id.Button02);
btnShowDialog_Layout.setOnClickListener(new ClickEvent());
}
//统一处理按键事件
class ClickEvent implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==btnShowDialog)
showDialog(testAlertDialog.this);
else if(v==btnShowDialog_Layout)
showDialog_Layout(testAlertDialog.this);
}
}
//显示基本的AlertDialog
private void showDialog(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setIcon(R.drawable.icon);
builder.setTitle("Title");
补充:移动开发 , Android ,