NullPointerException异常定制的ListView适配器 [英] NullPointerException custom listview adapter
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问题描述
您好计算器社区，
我在一个延伸BaseAdapter我的自定义适配器类的我getView方法得到一个NPE。我希望你能帮助我。
I'm getting a NPE in my getView method of my custom adapter class which extends BaseAdapter. I hope you can help me.
下面是我的getView方法：
Here's my getView method:
@Override
public View getView(int pos, View convertView, ViewGroup viewGroup) {
if(convertView==null){
LayoutInflater inflater = (LayoutInflater)context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row, null);
}
TextView datetv = (TextView) convertView.findViewById(R.id.date);
TextView valuetv = (TextView) convertView.findViewById(R.id.value);
TextView cattv = (TextView) convertView.findViewById(R.id.cat);
if(values.get(pos)>VALUE_MIN&&values.get(pos)<VALUE_MAX){
datetv.setTextColor(context.getResources().getColor(R.color.Good));
valuetv.setTextColor(context.getResources().getColor(R.color.Good));
cattv.setTextColor(context.getResources().getColor(R.color.Good));
}
else{
datetv.setTextColor(context.getResources().getColor(R.color.Bad));
valuetv.setTextColor(context.getResources().getColor(R.color.Bad));
cattv.setTextColor(context.getResources().getColor(R.color.Bad));
}
datetv.setText(dates.get(pos));
valuetv.setText(Double.toString(values.get(pos)));
cattv.setText(cats.get(pos));
LinearLayout l = (LinearLayout) convertView.findViewById(R.id.notelayout);
l.setFocusableInTouchMode(false);
l.setFocusable(false);
l.setOnClickListener(this);
l.setId(pos);
return convertView;
}
这是row.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="140dip"
android:layout_height="wrap_content"
android:padding="4dip"
>
<TextView
android:id="@+id/date"
android:layout_width="fill_parent"
android:layout_height="24dip"
android:textSize="15dip"
android:gravity="left" android:paddingLeft="6dip"
android:layout_weight="1" />
<TextView
android:id="@+id/cat"
android:layout_width="fill_parent"
android:layout_height="24dip"
android:textSize="15dip"
android:gravity="left" android:paddingLeft="6dip"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:padding="4dip"
>
<TextView
android:id="@+id/value"
android:layout_width="fill_parent"
android:layout_height="48dip"
android:textSize="40dip"
android:gravity="center"
/>
</LinearLayout>
<LinearLayout
android:id="@+id/notelayout"
android:orientation="vertical"
android:layout_width="50dip"
android:layout_height="wrap_content"
android:gravity="right"
android:layout_gravity="center"
android:padding="4dip"
>
<ImageView
android:id="@+id/note"
android:layout_width="wrap_content"
android:layout_height="48dip"
android:gravity="center"
android:src="@drawable/papiertje"
android:scaleType="centerInside"/>
</LinearLayout>
</LinearLayout>
这是我收到的错误：
And this is the error I'm getting:
01-30 00:34:31.772: ERROR/AndroidRuntime(497): FATAL EXCEPTION: main
01-30 00:34:31.772: ERROR/AndroidRuntime(497): java.lang.NullPointerException
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at com.yellos.android.glucose.ListViewAdapter.getView(ListViewAdapter.java:85)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.AbsListView.obtainView(AbsListView.java:1294)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.ListView.measureHeightOfChildren(ListView.java:1198)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.ListView.onMeasure(ListView.java:1109)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.View.measure(View.java:8171)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:696)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.onMeasure(LinearLayout.java:306)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.View.measure(View.java:8171)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.measureVertical(LinearLayout.java:381)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.LinearLayout.onMeasure(LinearLayout.java:304)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.View.measure(View.java:8171)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.View.measure(View.java:8171)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.View.measure(View.java:8171)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewRoot.performTraversals(ViewRoot.java:801)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.os.Handler.dispatchMessage(Handler.java:99)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.os.Looper.loop(Looper.java:123)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at android.app.ActivityThread.main(ActivityThread.java:4627)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at java.lang.reflect.Method.invokeNative(Native Method)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at java.lang.reflect.Method.invoke(Method.java:521)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-30 00:34:31.772: ERROR/AndroidRuntime(497): at dalvik.system.NativeStart.main(Native Method)
85号线 l.setFocusableInTouchMode（假）;
推荐答案
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