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分享同一个Fragment里面使用2个GridVIew
我在一个Fragment里面使用了两个GridView,运行时报了空指针,且不指向具体代码,希望大神帮忙解答一下,谢谢
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疯狂的兔子ccc 2016-09-06
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楼上说得对，getView问题
香辣小龙人 2016-09-06
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你的getView代码有问题啊，返回的永远是个空的view，改成这样试试
public View getView(int position, View convertView, ViewGroup parent) {
TextView textView;
if (convertView == null){
textView = new TextView(UiUtil.getContext());
convertView=textView;
}else{
textView = (TextView) convertView;
}
textView.setText(mRecent[position]);
return textView;
}
zhang106209 2016-09-06
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你的这个方法是什么？
@Override
protected View OnInitSuccessView() {
View view = View.inflate(UiUtil.getContext(), R.layout.item_search_default, null);
ButterKnife.bind(this, view);
initEvent();
return view;
}
不是应该onCreateView（）吗？
Zeinx_ 2016-09-06
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报错信息如下:
09-06 07:32:42.213 20371-20371/com.it.jdmarket E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.AbsListView.obtainView(AbsListView.java:2269)
at android.widget.GridView.onMeasure(GridView.java:1030)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2148)
at android.view.View.measure(View.java:15172)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1848)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1100)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1273)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Zeinx_ 2016-09-06
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xml文件如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:drawableLeft="@drawable/search_hot"
android:drawablePadding="10dp"
android:gravity="center_vertical"
android:text="热门搜索"/>
<GridView android:id="@+id/gv_search_hot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnWidth="90dp"
android:numColumns="3"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"></GridView>
<TextView android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:drawableLeft="@drawable/search_recent"
android:drawablePadding="10dp"
android:gravity="center_vertical"
android:text="最近搜索"/>
<GridView android:id="@+id/gv_search_recent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnWidth="90dp"
android:numColumns="3"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"></GridView>
<TextView android:id="@+id/tv_search_clearall"
android:layout_marginTop="20dp"
android:layout_gravity="center"
android:textColor="#aa000000"
android:textSize="20dp"
android:text="清除搜索历史"
android:layout_width="wrap_content"
android:drawableLeft="@drawable/clean"
android:layout_height="wrap_content"/>
</LinearLayout>
Zeinx_ 2016-09-06
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相关代码如下:
package com.it.jdmarket.activity.fragment;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.TextView;
import com.it.jdmarket.R;
import com.it.jdmarket.activity.base.BaseFragment;
import com.it.jdmarket.activity.base.LoadDataUi;
import com.it.jdmarket.activity.utils.UiUtil;
import butterknife.Bind;
import butterknife.ButterKnife;
/**
* Created by Administrator on 2016/9/2.
*/
public class SearchDefaultFragment extends BaseFragment {
@Bind(value = R.id.tv_search_clearall)
protected TextView mTv_clear;
@Bind(value = R.id.gv_search_hot)
protected GridView mGv_hot;
@Bind(value = R.id.gv_search_recent)
protected GridView mGv_recent;
String[] mHot = new String[]
{ "外套", "毛衣", "外套", "毛衣", "羽绒服","羽绒服","羽绒服","毛衣", "外套", "内裤", "毛衣", "内裤"};
String[] mRecent = new String[]
{ "内裤", "羽绒服", "外套", "毛衣", "羽绒服"};
@Override
protected View OnInitSuccessView() {
View view = View.inflate(UiUtil.getContext(), R.layout.item_search_default, null);
ButterKnife.bind(this, view);
initEvent();
return view;
}
private void initEvent() {
mGv_hot.setAdapter(new MyHotAdapter());
mGv_recent.setAdapter(new MyRecentAdapter());
mTv_clear.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mGv_recent.removeAllViews();
}
});
}
public class MyHotAdapter extends BaseAdapter{
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView textView;
if (convertView == null){
textView = new TextView(UiUtil.getContext());
}else{
textView = (TextView) convertView;
}
textView.setText(mHot[position]);
return convertView;
}
@Override
public int getCount() {
return mHot.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
public class MyRecentAdapter extends BaseAdapter{
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView textView;
if (convertView == null){
textView = new TextView(UiUtil.getContext());
}else{
textView = (TextView) convertView;
}
textView.setText(mRecent[position]);
return convertView;
}
@Override
public int getCount() {
return mRecent.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
@Override
protected LoadDataUi.Result doInbackground() {
return LoadDataUi.Result.SUCCESS;
}
}
