ฉันกำลังพัฒนาแอพ Android ที่อ่านข้อมูลจากฐานข้อมูล MySQL และฉันพบข้อผิดพลาดนี้ ฉันมีเค้าโครง XML นี้:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView android:id="@+id/wardNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="3dp"
android:text="Ward Number"
android:textSize="22dp"/>
<TextView android:id="@+id/dateTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/wardNumber"
android:layout_alignParentRight="true"
android:layout_marginRight="3dp"
android:text="Date-Time" />
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/dateTime"
android:layout_alignBottom="@+id/dateTime"
android:layout_alignLeft="@+id/wardNumber"
android:layout_marginLeft="3dp"
android:text="Name" />
</RelativeLayout> และนี่คือไฟล์ Java ของฉัน:
public ApplicationAdapter(Context context, List<Application> items) {
super(context, R.layout.app_custom_list, items);
this.items = items;
}
@Override
public int getCount() {
return items.size();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if(v == null) {
LayoutInflater li = LayoutInflater.from(getContext());
v = li.inflate(R.layout.app_custom_list, null);
}
Application app = items.get(position);
if(app != null) {
// ImageView icon = (ImageView)v.findViewById(R.id.appIcon);
TextView wardNumber = (TextView)v.findViewById(R.id.wardNumber);
TextView name = (TextView)v.findViewById(R.id.name);
// LinearLayout ratingCntr = (LinearLayout)v.findViewById(R.id.ratingCntr);
TextView dateTime = (TextView)v.findViewById(R.id.dateTime);
// if(icon != null) {
// Resources res = getContext().getResources();
// String sIcon = "com.sj.jsondemo:drawable/" + app.getIcon();
// icon.setImageDrawable(res.getDrawable(res.getIdentifier(sIcon, null, null)));
// }
if(wardNumber != null) wardNumber.setText(app.getTitle());
if(name != null) name.setText(app.getTitle());
if(dateTime != null) {
dateTime.setText(app.getTotalDl());
// NumberFormat nf = NumberFormat.getNumberInstance();
// dateTime.setText(nf.format(app.getTotalDl())+" dl");
}
}
return v;
}
}เมื่อกิจกรรมนี้ถูกเรียกฉันได้รับข้อความแสดงข้อผิดพลาดนี้:
11-24 21:12:03.633: E/AndroidRuntime(1251): FATAL EXCEPTION: main
11-24 21:12:03.633: E/AndroidRuntime(1251): android.content.res.Resources$NotFoundException: String resource ID #0x0
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.content.res.Resources.getText(Resources.java:201)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.TextView.setText(TextView.java:2863)
11-24 21:12:03.633: E/AndroidRuntime(1251): at com.sj.jsondemo.Appl icationAdapter.getView(ApplicationAdapter.java:53)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.AbsListView.obtainView(AbsListView.java:1430)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.ListView.onMeasure(ListView.java:1127)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.View.measure(View.java:8313)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:701)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.LinearLayout.onMeasure(LinearLayout.java:311)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.View.measure(View.java:8313)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.View.measure(View.java:8313)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.View.measure(View.java:8313)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.View.measure(View.java:8313)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.os.Looper.loop(Looper.java:130)
11-24 21:12:03.633: E/AndroidRuntime(1251): at android.app.ActivityThread.main(ActivityThread.java:3683)
11-24 21:12:03.633: E/AndroidRuntime(1251): at java.lang.reflect.Method.invokeNative(Native Method)
11-24 21:12:03.633: E/AndroidRuntime(1251): at java.lang.reflect.Method.invoke(Method.java:507)
11-24 21:12:03.633: E/AndroidRuntime(1251): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-24 21:12:03.633: E/AndroidRuntime(1251): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-24 21:12:03.633: E/AndroidRuntime(1251): at dalvik.system.NativeStart.main(Native Method)
11-24 21:12:08.922: I/Process(1251): Sending signal. PID: 1251 SIG: 9ฉันไม่รู้วิธีแก้ไขข้อผิดพลาดนี้