这是我的主要活动;
package com.example.sendsms;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void findContact(View view ){
Intent intent = new Intent(this,ReadContect.class);
startActivity(intent);
}
}
package com.example.sendsms;
import java.util.ArrayList;
import java.util.List;
import com.example.sendsms.domain.person;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
public class getContect{
public static List<person> getContectInfo(Context context){
ContentResolver cr = context.getContentResolver();
List<person> persons = new ArrayList<person>();
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri uriData = Uri.parse("content://com.android.contacts/data");
Cursor cursor = cr.query(uri, new String[] {"contact_id"} , null, null, null);
while(cursor.moveToNext()){
String id = cursor.getString(0);
if(id != null){
Cursor dataCursor = cr.query(uriData, new String[]{"data1","mimetype"}, "raw_contact_id=?", new String [] {id}, null);
person per = new person() ;
while(dataCursor.moveToNext()){
String data = dataCursor.getString(0);
String mimetype =dataCursor.getString(1);
if("vnd.android.cursor.item/name".equals(mimetype)){
per.setName(data);
}else if ("vnd.android.cursor.item/phone_v2".equals(mimetype)){
per.setNumber(data);
}
}
dataCursor.close();
persons.add(per);
}
}
cursor.close();
return persons;
}
}
package com.example.sendsms;
import java.util.List;
import com.example.sendsms.domain.person;
import com.example.sendsms.getContect;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class ReadContect extends Activity {
private ListView lv;
private List<person> persons;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_read_contect);
lv = (ListView) findViewById(R.id.lv);
lv.setAdapter(new ContectAdap());
persons = getContect.getContectInfo(this);
}
private class ContectAdap extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return persons.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
person per =persons.get(arg0);
View view = View.inflate(getApplicationContext(), R.layout.contect_view, null);
TextView et_name = (TextView) findViewById(R.id.name);
TextView et_number = (TextView) findViewById(R.id.number);
et_name.setText(per.getName());
et_name.setText(per.getNumber());
return view;
}
}
}
03-28 11:30:52.467: W/dalvikvm(4455): threadid=1: thread exiting with uncaught exception (group=0xb1d8cb20)
03-28 11:30:54.407: E/AndroidRuntime(4455): FATAL EXCEPTION: main
03-28 11:30:54.407: E/AndroidRuntime(4455): Process: com.example.sendsms, PID: 4455
03-28 11:30:54.407: E/AndroidRuntime(4455): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sendsms/com.example.sendsms.ReadContect}: java.lang.NullPointerException
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread.access$800(ActivityThread.java:135)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.os.Handler.dispatchMessage(Handler.java:102)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.os.Looper.loop(Looper.java:136)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread.main(ActivityThread.java:5017)
03-28 11:30:54.407: E/AndroidRuntime(4455): at java.lang.reflect.Method.invokeNative(Native Method)
03-28 11:30:54.407: E/AndroidRuntime(4455): at java.lang.reflect.Method.invoke(Method.java:515)
03-28 11:30:54.407: E/AndroidRuntime(4455): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
03-28 11:30:54.407: E/AndroidRuntime(4455): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
03-28 11:30:54.407: E/AndroidRuntime(4455): at dalvik.system.NativeStart.main(Native Method)
03-28 11:30:54.407: E/AndroidRuntime(4455): Caused by: java.lang.NullPointerException
03-28 11:30:54.407: E/AndroidRuntime(4455): at com.example.sendsms.ReadContect$ContectAdap.getCount(ReadContect.java:39)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.widget.ListView.setAdapter(ListView.java:480)
03-28 11:30:54.407: E/AndroidRuntime(4455): at com.example.sendsms.ReadContect.onCreate(ReadContect.java:26)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.Activity.performCreate(Activity.java:5231)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-28 11:30:54.407: E/AndroidRuntime(4455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
也许我的表达不够清楚，谢谢你的耐心;