我正在浏览android dev的初学者教程,我不明白这个错误。
错误出现在“callButton.setOnClickListener”(新的OnClickListener(){“
是的,我知道代码写得很糟糕,有点令人困惑,我会在工作后清理它。
我正在尝试添加一个按钮,打开联系人列表并允许您拨打电话。 package com.example.contactpicker;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.content.ContentUris;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.Intents;
import android.provider.ContactsContract.CommonDataKinds;
import android.provider.ContactsContract;
import android.view.MenuInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class ContactPickerTester extends Activity {
public static final int PICK_CONTACT = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contact_picker_tester);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View _view) {
Intent intent = new Intent(Intent.ACTION_PICK, Uri
.parse("content://contacts/"));
startActivityForResult(intent, PICK_CONTACT);
}
});
Button insertContactButton = (Button) findViewById(R.id.button2);
insertContactButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
insertContactWithIntent();
}
});
}
private void insertContactWithIntent() {
//inserting a new contact using intents//
Intent intent = new Intent(Intent.ACTION_INSERT,
ContactsContract.Contacts.CONTENT_URI);
startActivity(intent);
Button callButton = (Button) findViewById(R.id.button3);
callButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v){
Intent myIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("content://contacts/"));
startActivity(myIntent);
}
});
}
@Override
public void onActivityResult(int reqCode, int resCode, Intent data) {
super.onActivityResult(reqCode, resCode, data);
switch (reqCode) {
case (PICK_CONTACT): {
if (resCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
c.moveToFirst();
String name = c
.getString(c
.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME));
TextView tv = (TextView) findViewById(R.id.selected_contact_textview);
tv.setText(name);
}
break;
}
}
}
}
答案 0 :(得分:5)
这很简单,因为你在“O”上用大写写了OnClick,它是一个小写。
所以你必须替换
行public void OnClick(View v){
通过
public void onClick(View v){
请注意大写更改。