我在此链接中找到了以下示例，但是当我运行它时，我强制关闭，我不知道原因，您能帮我解决这个问题吗？还可以解释一下有关人员的信息，它们是删除线是不推荐使用 People 的警告！我是android和java编程的新手，请帮助我，任何建议将不胜感激。
以下是代码：
list.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is at /res/layout/list.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<ListView android:id="@android:id/list"
android:layout_width="fill_parent" android:layout_height="0dip"
android:layout_weight="1" />
<Button android:id="@+id/btn" android:onClick="doClick"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="Submit Selection" />
</LinearLayout>
测试班
package com.example.multicolumnlistview;
import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.util.Log;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
public class Test extends ListActivity
{
private static final String TAG = "ListViewActivity3";
private ListView lv = null;
private Cursor cursor = null;
private int idCol = -1;
private int nameCol = -1;
private int notesCol = -1;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv = getListView();
cursor = managedQuery(People.CONTENT_URI,
null, null, null, People.NAME);
String[] cols = new String[]{People.NAME};
idCol = cursor.getColumnIndex(People._ID);
nameCol = cursor.getColumnIndex(People.NAME);
notesCol = cursor.getColumnIndex(People.NOTES);
int[] views = new int[]{android.R.id.text1};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_multiple_choice,
cursor, cols, views);
this.setListAdapter(adapter);
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
}
public void doClick(View view) {
int count=lv.getCount();
SparseBooleanArray viewItems = lv.getCheckedItemPositions();
for(int i=0; i<count; i++) {
if(viewItems.get(i)) {
cursor.moveToPosition(i);
long id = cursor.getLong(idCol);
String name = cursor.getString(nameCol);
String notes = cursor.getString(notesCol);
Log.v(TAG, name + " is checked. Notes: " + notes +
". Position = " + i + ". Id = " + id);
}
}
}
}
这是logcat：
02-04 09:04:59.609: E/DatabaseUtils(99): at android.os.Binder.execTransact(Binder.java:287)
02-04 09:04:59.609: E/DatabaseUtils(99): at dalvik.system.NativeStart.run(Native Method)
02-04 09:04:59.619: D/ddm-heap(139): Got feature list request
02-04 09:04:59.628: D/AndroidRuntime(220): Shutting down VM
02-04 09:04:59.628: W/dalvikvm(220): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
02-04 09:04:59.628: E/AndroidRuntime(220): Uncaught handler: thread main exiting due to uncaught exception
02-04 09:04:59.639: E/AndroidRuntime(220): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multicolumnlistview/com.example.multicolumnlistview.Test}: java.lang.SecurityException: Permission Denial: reading com.android.providers.contacts.ContactsProvider2 uri content://contacts/people from pid=220, uid=10029 requires android.permission.READ_CONTACTS
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.os.Handler.dispatchMessage(Handler.java:99)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.os.Looper.loop(Looper.java:123)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread.main(ActivityThread.java:4363)
02-04 09:04:59.639: E/AndroidRuntime(220): at java.lang.reflect.Method.invokeNative(Native Method)
02-04 09:04:59.639: E/AndroidRuntime(220): at java.lang.reflect.Method.invoke(Method.java:521)
02-04 09:04:59.639: E/AndroidRuntime(220): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
02-04 09:04:59.639: E/AndroidRuntime(220): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
02-04 09:04:59.639: E/AndroidRuntime(220): at dalvik.system.NativeStart.main(Native Method)
02-04 09:04:59.639: E/AndroidRuntime(220): Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.contacts.ContactsProvider2 uri content://contacts/people from pid=220, uid=10029 requires android.permission.READ_CONTACTS
02-04 09:04:59.639: E/AndroidRuntime(220): at android.os.Parcel.readException(Parcel.java:1218)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:160)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.content.ContentProviderProxy.bulkQuery(ContentProviderNative.java:326)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.content.ContentProviderProxy.query(ContentProviderNative.java:345)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.content.ContentResolver.query(ContentResolver.java:202)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.Activity.managedQuery(Activity.java:1495)
02-04 09:04:59.639: E/AndroidRuntime(220): at com.example.multicolumnlistview.Test.onCreate(Test.java:30)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-04 09:04:59.639: E/AndroidRuntime(220): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
02-04 09:04:59.639: E/AndroidRuntime(220): ... 11 more
02-04 09:04:59.649: I/Process(51): Sending signal. PID: 220 SIG: 3
02-04 09:04:59.659: I/dalvikvm(220): threadid=7: reacting to signal 3
02-04 09:04:59.659: E/dalvikvm(220): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
02-04 09:04:59.739: D/ddm-heap(110): Got feature list request
02-04 09:04:59.769: D/ddm-heap(175): Got feature list request
02-04 09:04:59.779: I/ARMAssembler(51): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x345958:0x345a14] in 388876 ns
02-04 09:04:59.788: I/ARMAssembler(51): generated scanline__00000177:03515104_00001001_00000000 [ 91 ipp] (114 ins) at [0x345a18:0x345be0] in 434133 ns
02-04 09:04:59.849: D/ddm-heap(209): Got feature list request
02-04 09:04:59.979: D/ddm-heap(200): Got feature list request
02-04 09:05:08.918: W/ActivityManager(51): Launch timeout has expired, giving up wake lock!
02-04 09:05:09.202: W/ActivityManager(51): Activity idle timeout for HistoryRecord{44e4c570 com.example.multicolumnlistview/.Test}