我正在创建一个应用程序，它从联系人意图中读取联系人姓名和号码，并添加与相应联系人相关的注释。我应该从contactscontract读取信息并将其分别设置到编辑文本上。但是它显示了一些错误。 这是我的Add_note.java活动：
package com.example.shubhangi.contactnotes;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.ArrayList;
public class Add_note extends AppCompatActivity {
private static final int RESULT_PICK_CONTACT=1001;
private EditText name;
private EditText number;
private EditText contactnot;
ArrayList<NoteView> notes= new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_note);
name=(EditText) findViewById(R.id.con_name);
name.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent contactPickerIntent = new Intent(Intent.ACTION_PICK,
ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
startActivityForResult(contactPickerIntent, RESULT_PICK_CONTACT);
}
});
number=(EditText) findViewById(R.id.con_numb);
contactnot=(EditText) findViewById(R.id.con_note);
if(contactnot.getText()!=null){
Button add=(Button)findViewById(R.id.save);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String n1=name.getText().toString();
String n2=number.getText().toString();
String n3=contactnot.getText().toString();
NoteView nv =new NoteView();
nv.setName_contact(n1);
nv.setPhno_contact(n2);
nv.setNote_contact(n3);
notes.add(nv);
Intent i=new Intent(Add_note.this,MainActivity.class);
i.putExtra("Note list",notes);
startActivity(i);
}
});
}
}
@Override
public void onBackPressed() {
Intent i=new Intent(Add_note.this,MainActivity.class);
i.putExtra("Note list",notes);
startActivity(i);
super.onBackPressed();
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// check whether the result is ok
if (resultCode == RESULT_OK) {
// Check for the request code, we might be usign multiple startActivityForReslut
switch (requestCode) {
case RESULT_PICK_CONTACT:
contactPicked(data);
break;
}
} else {
Toast.makeText(Add_note.this, "Could not load contact", Toast.LENGTH_SHORT).show();
}
}
private void contactPicked(Intent data)
{
Cursor cursor;
try {
Uri uri = data.getData();
//Query the content uri
String id = uri.getLastPathSegment();
Integer id_c=Integer.parseInt(id);
cursor = getContentResolver().query(uri, null, null, null, null);
if(cursor.moveToNext()) {
int columnIndex_name = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
String stringName = cursor.getString(columnIndex_name);
int columnIndex_HASPHONENUMBER = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);
String stringHasPhoneNumber = cursor.getString(columnIndex_HASPHONENUMBER);
String stringNumber;
if (stringHasPhoneNumber.equalsIgnoreCase("1")) {
Cursor cursorNum = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + id_c,
null,
null);
int columnIndex_number = cursorNum.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
stringNumber = cursorNum.getString(columnIndex_number);
number.setText(stringNumber);
cursorNum.close();
}
name.setText(stringName);
cursor.close();
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
这是我的日志：
android.database.CursorIndexOutOfBoundsException: Index -1 reques android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 0
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.database.AbstractCursor.checkPosition(AbstractCursor.java:426)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:146)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:60)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.database.CursorWrapper.getString(CursorWrapper.java:114)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at com.example.shubhangi.contactnotes.Add_note.contactPicked(Add_note.java:105)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at com.example.shubhangi.contactnotes.Add_note.onActivityResult(Add_note.java:73)
06-08 22:56:14.349 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.Activity.dispatchActivityResult(Activity.java:6168)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.ActivityThread.deliverResults(ActivityThread.java:3733)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes D/ActivityThread: SEND_RESULT handled : 0 / ResultData{token=android.os.BinderProxy@60b629b results[ResultInfo{who=null, request=1001, result=-1, data=Intent { dat=content://com.android.contacts/data/13049 flg=0x1 }}]}
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.ActivityThread.handleSendResult(ActivityThread.java:3780)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.ActivityThread.access$1300(ActivityThread.java:162)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes V/ActivityThread: Performing resume of ActivityRecord{2e7cd6aa token=android.os.BinderProxy@60b629b {com.example.shubhangi.contactnotes/com.example.shubhangi.contactnotes.Add_note}} finished=false
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1461)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.os.Handler.dispatchMessage(Handler.java:106)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.os.Looper.loop(Looper.java:189)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5530)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at java.lang.reflect.Method.invoke(Native Method)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at java.lang.reflect.Method.invoke(Method.java:372)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950)
06-08 22:56:14.350 12446-12446/com.example.shubhangi.contactnotes W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
答案 0 :(得分：0)
执行查询后，您必须调用 cursor.moveToFirst（） ...
试试这个
Cursor cursor = getContentResolver().query(Contacts.CONTENT_URI,
null, null, null, null);
if(cursor != null && cursor.moveToFirst())
{
String id = cursor.getString(cur.getColumnIndex(Contacts._ID));
if (cursor.getCount() > 0) {
while (cursor.moveToNext()) {
...