有人可以帮我吗?我有一个AlertDialog框,它工作正常,但我想要的是当alertdialog弹出时,它会自动检查一个单选按钮。
例如,弹出警告对话框时会检查“10分钟”。
怎么做?
以下是我的工作代码。
final CharSequence[] deleteFilesBy = {"5 minutes","10 minutes", "15 minutes"};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Delete Files by?")
.setSingleChoiceItems(deleteFilesBy,-1, new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
if(deleteFilesBy[which]=="5 minutes")
{
// do something
}
else if (deleteFilesBy[which]=="10 minutes")
{
// do something
}
else if (deleteFilesBy[which]=="15 minutes")
{
// do something
}
dialog.dismiss();
}
}).setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
arg0.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
请帮助!
由于
RJUY
答案 0 :(得分:2)
TestRadio.java:
package com.dave.kelley;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioButton;
public class TestRadioActivity extends Activity {
int timeSetting = 0;
RadioButton radio0;
RadioButton radio1;
RadioButton radio2;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(listener);
radio0 = (RadioButton) findViewById(R.id.radio0);
radio1 = (RadioButton) findViewById(R.id.radio1);
radio2 = (RadioButton) findViewById(R.id.radio2);
}
public OnClickListener listener = new OnClickListener() {
public void onClick(View v) {
if (timeSetting == 0) {
radio0.setChecked(true);
radio1.setChecked(false);radio2.setChecked(false);
}
if (timeSetting == 1) {
radio1.setChecked(true);
radio0.setChecked(false);radio2.setChecked(false);
}
if (timeSetting == 2) {
radio2.setChecked(true);
radio0.setChecked(false);radio1.setChecked(false);
}
timeSetting++;
if(timeSetting == 3 || timeSetting > 3) {
timeSetting = 0;
}
}
};
}
main.xml中:
<?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:orientation="vertical" >
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="RadioButton" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RadioButton" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RadioButton" />
</RadioGroup>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
答案 1 :(得分:1)
这应该这样做。
RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);
rg.check(R.id.radioButton1);
答案 2 :(得分:1)
只需将选中的项目设置为您想要的内容......
builder.setTitle("Delete Files by?")
.setSingleChoiceItems(deleteFilesBy, WHICH ITEM YOU WANT , new DialogInterface.OnClickListener()
答案 3 :(得分:0)
您可以在XML中执行此操作:
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="@string/sA" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/A" />
<RadioButton
android:id="@+id/radio3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/D" />
<RadioButton
android:id="@+id/radio4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/sD" />
</RadioGroup>
第一个radiobutton,radio1,具有属性android:checked =“true”。这意味着当它加载时,该无线电将被默认,用户当然可以改变它。
编辑:
更具程序性的方法:
int timeSetting = 1;//say 0 = 5; 1=10; 2=15 (set this elsewhere in your code based
//on how you have predetermined the time length
RadioButton radio0 = (RadioButton) findViewById(R.id.radio0);
RadioButton radio1 = (RadioButton) findViewById(R.id.radio1);
RadioButton radio2 = (RadioButton) findViewById(R.id.radio2);
if (timeSetting == 0) {
radio0.setChecked(true);
radio1.setChecked(false);radio2.setChecked(false);
}
if (timeSetting == 1) {
radio1.setChecked(true);
radio0.setChecked(false);radio2.setChecked(false);
}
if (timeSetting == 2) {
radio2.setChecked(true);
radio0.setChecked(false);radio1.setChecked(false);
}