(Android-intent)如何修复字符串R.id.chooser，使其被java文件引用

Question

我正在做书中的练习，首先是android开发，并按照书中的说明进行了练习，但是输入R.id.chooser会显示chooser symbol不能解析，即使我在string XML中声明了它。这太奇怪了。有谁有解决这个问题的建议吗？

java文件：

package com.hfad.messenger;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;`enter code here`
import android.content.Intent;
import android.widget.EditText;

public class CreateMessageActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_create_message);
    }

    //Call onSendMessage() when the button is clicked
    public void onSendMessage(View view) {
        EditText messageView = (EditText)findViewById(R.id.message);
        String messageText = messageView.getText().toString();
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("text/pain");
        intent.putExtra(Intent.EXTRA_TEXT, messageText);
        String chooserTitle = getString(R.string.chooser);
        Intent chosenIntent = Intent.createChooser(intent, chooserTitle);
        startActivity(chosenIntent);
    }
}

xml文件：

<resources>
    <string name="app_name">Messenger</string>
    <string name="send">Send Message</string>
    <String name="chooser">Send Message...</String>
    <string name="action_settings">Settings</string>
    <string name="title_activity_receive_message">ReceiveMessageActivity</string>
</resources>

Answer 1

您已经使用大写首字母声明了chooser，例如String，但它看起来应该类似于string

<resources>
    <string name="app_name">Messenger</string>
    <string name="send">Send Message</string>
    <string name="chooser">Send Message...</string>
    <string name="action_settings">Settings</string>
    <string name="title_activity_receive_message">ReceiveMessageActivity</string>
</resources>

这就是Android Studio找不到chooser字符串的原因。