我想在Android中实现自定义对话框。但是,当我自己尝试时,我无法运行我的代码。
我在Eclipse中的这些语句中出错:
1)Button button1main = (Button) findViewById(R.id.*btn1*);
2)TextView text = (TextView) dialog.findViewById(R.id.*txt3*);
我的Android代码是:
package com.example;
import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class Main2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.front);
Button button1main = (Button) findViewById(R.id.btn1);
button1main.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Dialog dialog = new Dialog(Main2.this);
dialog.setContentView(R.layout.maindialog);
dialog.setTitle("This is my custom dialog box");
dialog.setCancelable(true);
TextView text = (TextView) dialog.findViewById(R.id.txt3);
text.setText(R.string.lots_of_text);
Button button = (Button) dialog.findViewById(R.id.Button01);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
finish();
}
});
dialog.show();
}
});
}
}
这是我的xml: front.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/txt3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is my main activity, from here, I want to display a dialog, after the user clicked the button below this text."/>
<Button
android:layout_height="wrap_content"
android:layout_below="@+id/txt3"
android:layout_width="wrap_content"
android:id="@+id/btn1"
android:text="Hey! There is more..."/>
</RelativeLayout>
maindialog.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout>
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content">
<ScrollView>
android:id="@+id/ScrollView01"
android:layout_width="wrap_content"
android:layout_height="200px">
<TextView>
android:text="@+id/txt3"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</TextView>
</ScrollView>
<Button>
android:id="@+id/Button01"
android:layout_below="@id/ScrollView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="Cancel"
</Button>
</RelativeLayout>
在我删除上述语句中的红线错误之前,我无法在Eclipse中运行我的代码。有人可以帮助我吗?
由于
答案 0 :(得分:3)
xml语法中存在错误。
<RelativeLayout> <- this is wrong
android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
您需要删除“&gt;” ,这适用于所有元素,而不仅仅是相对布局
<RelativeLayout
android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">