Android之复选框对话框
16lz
2021-01-23
main.xml布局文件
<? 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 " >
< EditText android:text = ""
android:id = " @+id/editText "
android:layout_width = " fill_parent "
android:layout_height = " wrap_content "
android:editable = " false "
android:cursorVisible = " false " />
< Button android:text = " 显示复选框对话框 "
android:id = " @+id/button "
android:layout_width = " fill_parent "
android:layout_height = " wrap_content " />
</ LinearLayout >
array.xml数组
<? xml version = " 1.0 " encoding = " utf-8 " ?>
< resources >
< string - array name = " hobby " >
< item > 游泳 </ item >
< item > 打篮球 </ item >
< item > 登山 </ item >
</ string - array >
</ resources >
AlertActivity类
package com.ljq.dialog;
import android.app.Activity;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class AlertDialog extends Activity {
private EditText editText;
private final static int DIALOG = 1 ;
boolean [] flags = new boolean []{ false , false , false }; // 初始复选情况
String[] items = null ;
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);
items = getResources().getStringArray(R.array.hobby);
editText = (EditText)findViewById(R.id.editText);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener( new View.OnClickListener() {
public void onClick(View v) {
// 显示对话框
showDialog(DIALOG);
}
});
}
/**
* 创建复选框对话框
*/
@Override
protected Dialog onCreateDialog( int id) {
Dialog dialog = null ;
switch (id) {
case DIALOG:
Builder builder = new android.app.AlertDialog.Builder( this );
// 设置对话框的图标
builder.setIcon(R.drawable.header);
// 设置对话框的标题
builder.setTitle( " 复选框对话框 " );
builder.setMultiChoiceItems(R.array.hobby, flags, new DialogInterface.OnMultiChoiceClickListener(){
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
flags[which] = isChecked;
String result = " 您选择了： " ;
for ( int i = 0 ; i < flags.length; i ++ ) {
if (flags[i]){
result = result + items[i] + " 、 " ;
}
}
editText.setText(result.substring( 0 , result.length() - 1 ));
}
});
// 添加一个确定按钮
builder.setPositiveButton( " 确 定 " , new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which) {
}
});
// 创建一个复选框对话框
dialog = builder.create();
break ;
}
return dialog;
}
}
运行结果
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