带Gridview的Alerdialog（Imageadpater）
活动代码：
public void iconSelector(View view) {
CoordinatorLayout coordinatorLayout = (CoordinatorLayout) findViewById(R.id.create_coordinator);
LayoutInflater inflater = getLayoutInflater();
View dialogView = inflater.inflate(R.layout.item_icon_grid_layout, coordinatorLayout, false);
GridView gridView = (GridView) dialogView.findViewById(R.id.itemIconGridLayout);
database = new Database(this);
mId = database.getLastIdOD();
if(mId>=1) {
iconList = database.getIconList();
}
database.close();
gridView.setAdapter(new IconsAdapter(getApplicationContext(),iconList));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
mIcon = iconList.get(position).getName();
}
});
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(dialogView);
builder.setTitle(R.string.iconChoose);
mIconSelectorDialog= builder.show();
}
在IconsAdapter中的代码：
public class IconsAdapter extends BaseAdapter {
private Context mContext;
List<Icon> iconList;
public IconsAdapter(Context context,List<Icon> list ){
mContext = context;
iconList = list;
int d = iconList.size();
String i= ""+d;
Log.d("MyLogIconAdapter",iconList.get(0).getName());
Log.d("MyLog",i);
}
public int getCount() {
return iconList.size();
}
public Object getItem(int position) {
return iconList.get(position).getId();
}
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View grid;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
grid = new View(mContext);
grid = inflater.inflate(R.layout.item_icon_grid,null);
ImageView imageView = (ImageView) grid.findViewById(R.id.imageItemIconGrid);
int iconResId = mContext.getResources().getIdentifier(iconList.get(position).getName(), "drawable", mContext.getPackageName());
imageView.setImageResource(iconResId);
} else {
grid = (View) convertView;
}
return grid;
}
}
Item_icon_grid：
<ImageView
android:id="@+id/imageItemIconGrid"
android:src="@drawable/ic_drafts_white_24dp"
android:layout_width="18dp"
android:layout_height="18dp"
android:layout_gravity="center" />
item_icon_grid_layout：
<GridView
android:id="@+id/itemIconGridLayout"
android:numColumns="auto_fit"
android:background="#ffffff"
android:verticalSpacing="5dp"
android:horizontalSpacing="5dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
</GridView>
日志：
致命异常：主进程：com.universe.time.officereminder，PID：25213 java.lang.NullPointerException：尝试在com.universe的空对象引用上调用虚方法'void android.widget.ImageView.setImageResource（int）' 。android.widget.GridView.onMeasure（GridView.java:1064）上的android.widget.AbsListView.obtainView（AbsListView.java:2828）上的.time.proffesionaldiary.adapters.IconsAdapter.getView（IconsAdapter.java:60）。 view.View.measure（View.java:18647）at android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）at android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1435）at android.widget.LinearLayout.measureVertical （LinearLayout.java:721）在android.view.View.measure（View.java:18647）android.view.ViewGroup.measureChildWithMargins（ViewGroup.java：android.widget.LinearLayout.onMeasure（LinearLayout.java:612） 5832）at android.widget.FrameLayout.onMeasure（FrameLayout.java:430）at android.view.View.measure（View.java:18647）at android .view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）在android.view.ViewGroup上的android.view.View.measure（View.java:18647）上的android.widget.FrameLayout.onMeasure（FrameLayout.java:430）。在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1435）android.widget.LinearLayout.measureVertical（LinearLayout.java:721）android.widget.LinearLayout.onMeasure（LinearLayout.java）上的measureChildWithMargins（ViewGroup.java:5832） ：612）at android.view.View.measure（View.java:18647）at android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）at android.widget.FrameLayout.onMeasure（FrameLayout.java:430）at android 。android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）上的android.view.View.measure（View.java:18647）上的.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:135）。 widget.FrameLayout.onMeasure（FrameLayout.java:430）at android.view.View.measure（View.java:18647）at android.view.ViewGroup.measureChildWithMargins（ViewG roup.java:5832）在android.view.View.measure（View.java:18647）android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）android.widget.FrameLayout.onMeasure（FrameLayout.java:430） ）android.widget.Lineout.measureChildBeforeLayout（LinearLayout.java:1435）在android.widget.LinearLayout.measureVertical（LinearLayout.java:721）在android.widget.LinearLayout.onMeasure（LinearLayout.java:612）在android.view .View.measure（View.java:18647）at android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5832）at android.widget.FrameLayout.onMeasure（FrameLayout.java:430）at com.android.internal.policy。在android.view.View.App.ViewRootImpl上的android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2298）上的android.view.View.measure（View.java:18647）上的impl.PhoneWindow $ DecorView.onMeasure（PhoneWindow.java:3012） .measureHierarchy（ViewRootImpl.java:1320）at android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1588）at android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1230）a t android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6748）at android.view.Choreographer $ CallbackRecord.run（Choreographer.java:777）at android.view.Choreographer.doCallbacks（Choreographer.java:590）at android.view.Choreographer.doFrame（Choreographer.java:560）at android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:763）at android.os.Handler.handleCallback（Handler.java:739）at android.os .Handler.dispatchMessage（Handler.java:95）at android.os.Looper.loop（Looper.java:145）at android.app.ActivityThread.main（ActivityThread.java:6126）at java.lang.reflect.Method。在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1399）com.android.internal处调用（Native Method）在java.lang.reflect.Method.invoke（Method.java:372）。 os.ZygoteInit.main（ZygoteInit.java:1194）
你可以尝试下面的代码，它可能会有帮助。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View grid = inflater.inflate(R.layout.item_icon_grid, null);
if (convertView == null) {
ImageView imageView = (ImageView) grid.findViewById(R.id.imageItemIconGrid);
int iconResId = mContext.getResources().getIdentifier(iconList.get(position).getName(), "drawable", mContext.getPackageName());
imageView.setImageResource(iconResId);
} else {
grid = (View) convertView;
}
return grid;
}
参考：https：//www.caveofprogramming.com/guest-posts/custom-gridview-with-imageview-and-textview-in-android.html
错误清楚地表明你正试图在null图像视图中设置图像，所以检查
ImageView imageView = (ImageView) grid.findViewById(R.id.imageItemIconGrid) ;
图像视图是网格布局的一部分，如果是，则检查网格布局的ID，如果图像视图正确，则检查图像视图。
请调试并检查。
链接地址: http://www.djcxy.com/p/84727.html上一篇: Alerdialog with Gridview(Imageadpater)
下一篇: Android text and image adapter for gridview in fragment