嗨,我正在尝试检索联系人姓名及其类型。我想将它们放在列表视图中,但是在名称和电话类型数组以及列表视图中获取空值。任何帮助都会很重要。提前谢谢。
package application.test;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public final class TestActivity extends Activity {
String[] name;
String[] phoneType;
ListView lv;
String s[];
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
testGetContacts();
lv = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> sa=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,s);
lv.setAdapter(sa);
}//method
private void testGetContacts() {
ContentResolver cr = getContentResolver();
String[] projection = new String[] { ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME, Phone.TYPE};
Cursor cur = cr.query(ContactsContract.Data.CONTENT_URI,
projection, null, null, null);
if (cur != null && cur.moveToFirst()) {
try {
int indexID = cur.getColumnIndexOrThrow(ContactsContract.Contacts._ID);
int indexName = cur.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME);
int indexPhoneType = cur.getColumnIndexOrThrow(Phone.TYPE);
name=new String[cur.getCount()];
phoneType=new String[cur.getCount()];
while (cur.moveToNext()) {
int i=0;
String id = cur.getString(indexID);
null--> name[i] = cur.getString(indexName);
null--> phoneType[i] = cur.getString(indexPhoneType);
String temp="id="+id+"-name="+name[i]+"-phoneType="+phoneType[i];
s[i]=temp;
i++;
}//while
}catch(Exception e){
e.printStackTrace();
}//catch
}//if
}//method}
}
日志猫:
11-08 15:21:45.250: WARN/System.err(1049): java.lang.NullPointerException
11-08 15:21:45.250: WARN/System.err(1049): at application.test.TestActivity.testGetContacts(TestActivity.java:60)
11-08 15:21:45.270: WARN/System.err(1049): at application.test.TestActivity.onCreate(TestActivity.java:23)
11-08 15:21:45.270: WARN/System.err(1049): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-08 15:21:45.270: WARN/System.err(1049): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-08 15:21:45.270: WARN/System.err(1049): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-08 15:21:45.270: WARN/System.err(1049): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-08 15:21:45.270: WARN/System.err(1049): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-08 15:21:45.279: WARN/System.err(1049): at android.os.Handler.dispatchMessage(Handler.java:99)
11-08 15:21:45.290: WARN/System.err(1049): at android.os.Looper.loop(Looper.java:123)
11-08 15:21:45.290: WARN/System.err(1049): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-08 15:21:45.290: WARN/System.err(1049): at java.lang.reflect.Method.invokeNative(Native Method)
11-08 15:21:45.290: WARN/System.err(1049): at java.lang.reflect.Method.invoke(Method.java:521)
11-08 15:21:45.290: WARN/System.err(1049): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-08 15:21:45.290: WARN/System.err(1049): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-08 15:21:45.300: WARN/System.err(1049): at dalvik.system.NativeStart.main(Native Method)
11-08 15:21:45.300: DEBUG/AndroidRuntime(1049): Shutting down VM
11-08 15:21:45.300: WARN/dalvikvm(1049): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): FATAL EXCEPTION: main
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): java.lang.RuntimeException: Unable to start activity ComponentInfo{application.test/application.test.TestActivity}: java.lang.NullPointerException
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.os.Handler.dispatchMessage(Handler.java:99)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.os.Looper.loop(Looper.java:123)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at java.lang.reflect.Method.invokeNative(Native Method)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at java.lang.reflect.Method.invoke(Method.java:521)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at dalvik.system.NativeStart.main(Native Method)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): Caused by: java.lang.NullPointerException
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at java.util.Arrays$ArrayList.<init>(Arrays.java:49)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at java.util.Arrays.asList(Arrays.java:171)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:125)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at application.test.TestActivity.onCreate(TestActivity.java:26)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-08 15:21:45.349: ERROR/AndroidRuntime(1049): ... 11 more
11-08 15:21:45.380: WARN/ActivityManager(58): Force finishing activity application.test/.TestActivity
11-08 15:21:45.911: WARN/ActivityManager(58): Activity pause timeout for HistoryRecord{44f48960 application.test/.TestActivity}
11-08 15:21:47.029: DEBUG/SntpClient(58): request time failed: java.net.SocketException: Address family not supported by protocol
11-08 15:21:56.575: WARN/ActivityManager(58): Activity destroy timeout for HistoryRecord{44f48960 application.test/.TestActivity}