问题
I am trying to add Fancycoverflow in my app,It works fine with static image as given in this example.
but i did some changes in Adapter, and i try to run my app and it crashes and shows following error
FATAL EXCEPTION: main
java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.Gallery$LayoutParams
at android.widget.Gallery.setUpChild(Gallery.java:889)
at android.widget.Gallery.makeAndAddView(Gallery.java:858)
at android.widget.Gallery.layout(Gallery.java:665)
at android.widget.Gallery.onLayout(Gallery.java:357)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1670)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1528)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1441)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1670)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1528)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1441)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:14118)
at android.view.ViewGroup.layout(ViewGroup.java:4467)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2183)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1947)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4872)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
at android.view.Choreographer.doCallbacks(Choreographer.java:579)
at android.view.Choreographer.doFrame(Choreographer.java:548)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
at android.os.Handler.handleCallback(Handler.java:800)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5371)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
In example it is given as
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import at.technikum.mti.fancycoverflow.FancyCoverFlow;
import at.technikum.mti.fancycoverflow.FancyCoverFlowAdapter;
import at.technikum.mti.fancycoverflow.samples.R;
public class ViewGroupExample extends Activity {
// =============================================================================
// Supertype overrides
// =============================================================================
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.layout_inflate_example);
FancyCoverFlow fancyCoverFlow = (FancyCoverFlow) findViewById(R.id.fancyCoverFlow);
fancyCoverFlow.setAdapter(new ViewGroupExampleAdapter());
}
// =============================================================================
// Private classes
// =============================================================================
private static class ViewGroupExampleAdapter extends FancyCoverFlowAdapter {
// =============================================================================
// Private members
// =============================================================================
private int[] images = {R.drawable.image1, R.drawable.image2, R.drawable.image3, R.drawable.image4, R.drawable.image5, R.drawable.image6,};
// =============================================================================
// Supertype overrides
// =============================================================================
@Override
public int getCount() {
return images.length;
}
@Override
public Integer getItem(int i) {
return images[i];
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getCoverFlowItem(int i, View reuseableView, ViewGroup viewGroup) {
CustomViewGroup customViewGroup = null;
if (reuseableView != null) {
customViewGroup = (CustomViewGroup) reuseableView;
} else {
customViewGroup = new CustomViewGroup(viewGroup.getContext());
customViewGroup.setLayoutParams(new FancyCoverFlow.LayoutParams(300, 600));
}
customViewGroup.getImageView().setImageResource(this.getItem(i));
customViewGroup.getTextView().setText(String.format(\"Item %d\", i));
return customViewGroup;
}
}
private static class CustomViewGroup extends LinearLayout {
// =============================================================================
// Child views
// =============================================================================
private TextView textView;
private ImageView imageView;
private Button button;
// =============================================================================
// Constructor
// =============================================================================
private CustomViewGroup(Context context) {
super(context);
this.setOrientation(VERTICAL);
this.textView = new TextView(context);
this.imageView = new ImageView(context);
this.button = new Button(context);
LinearLayout.LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
this.textView.setLayoutParams(layoutParams);
this.imageView.setLayoutParams(layoutParams);
this.button.setLayoutParams(layoutParams);
this.textView.setGravity(Gravity.CENTER);
this.imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
this.imageView.setAdjustViewBounds(true);
this.button.setText(\"Goto GitHub\");
this.button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(\"https://davidschreiber.github.com/FancyCoverFlow\"));
view.getContext().startActivity(i);
}
});
this.addView(this.textView);
this.addView(this.imageView);
this.addView(this.button);
}
// =============================================================================
// Getters
// =============================================================================
private TextView getTextView() {
return textView;
}
private ImageView getImageView() {
return imageView;
}
}
}
And what i change as per my requirement is
MyAdapter
private static class ViewGroupExampleAdapter extends FancyCoverFlowAdapter {
private LayoutInflater inflater;
public Activity a;
View vi;
public ArrayList<HashMap<String, String>> arr;
public ArrayList<HashMap<String, String>> data;
public ViewGroupExampleAdapter(Activity homeActivity, ArrayList<HashMap<String, String>> myList) {
arr = myList;
a = homeActivity;
inflater = (LayoutInflater) a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
// =============================================================================
// Private members
// =============================================================================
// private int[] images = {R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,};
// =============================================================================
// Supertype overrides
// =============================================================================
@Override
public int getCount() {
return arr.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
System.out.println(\"position=\" + position);
return position;
}
@Override
public View getCoverFlowItem(int i, View reuseableView, ViewGroup viewGroup) {
View vi = reuseableView;
if (vi == null)
vi = inflater.inflate(R.layout.create_club_inflate, null);
TextView date1 = (TextView) vi.findViewById(R.id.txtDate1);
TextView date = (TextView) vi.findViewById(R.id.txtDate);
TextView team1_name = (TextView) vi.findViewById(R.id.txtTeamName);
TextView team2_name = (TextView) vi.findViewById(R.id.txtVanue);
TextView ground = (TextView) vi.findViewById(R.id.txt_time);
HashMap<String, String> product = new HashMap<String, String>();
product = arr.get(i);
System.out.println(\"name 1= \" + product.get(\"str_team1_name\") + \" team 2=\"
+ product.get(\"str_team2_obj_name\"));
date1.setText(product.get(\"str_srs\"));
date.setText(product.get(\"str_startdt\"));
team1_name.setText(product.get(\"str_team1_name\"));
team1_name.setAlpha(5000);
team2_name.setText(product.get(\"str_team2_obj_name\"));
team2_name.setAlpha(5000);
// Typeface font = Typeface.createFromAsset(getAssets(), \"TitilliumText22L006.otf\");
int[] color = { Color.rgb(100, 100, 100), Color.rgb(255, 255, 255) };
float[] color_position = { 0, 1 };
TileMode tile_mode = TileMode.MIRROR; // or TileMode.REPEAT;
LinearGradient lin_grad = new LinearGradient(0, 0, 0, 50, color, color_position, tile_mode);
Shader shader_gradient = lin_grad;
team1_name.getPaint().setShader(shader_gradient);
team2_name.getPaint().setShader(shader_gradient);
//team1_name.setTypeface(font);
// team2_name.setTypeface(font);
ground.setText(product.get(\"str_grnd\"));
product.get(\"str_sName\");
product.get(\"str_team2_obj_sName\");
String first_team_id = product.get(\"str__team1_id\");
String second_team_id = product.get(\"str_team2_obj_id\");
switch (first_team_id) {
case \"PAK\":
team1_name.setBackgroundResource(R.drawable.pak);
break;
case \"UAE\":
team1_name.setBackgroundResource(R.drawable.uae);
break;
case \"AUS\":
team1_name.setBackgroundResource(R.drawable.aus);
break;
case \"AFG\":
team1_name.setBackgroundResource(R.drawable.afg);
break;
case \"6\":
team1_name.setBackgroundResource(R.drawable.ban);
break;
case \"23\":
team1_name.setBackgroundResource(R.drawable.sco);
break;
case \"2\":
team1_name.setBackgroundResource(R.drawable.ind);
break;
case \"WI\":
team1_name.setBackgroundResource(R.drawable.wi);
break;
case \"13\":
team1_name.setBackgroundResource(R.drawable.nz);
break;
case \"SL\":
team1_name.setBackgroundResource(R.drawable.sl);
break;
case \"9\":
team1_name.setBackgroundResource(R.drawable.eng);
break;
case \"27\":
team1_name.setBackgroundResource(R.drawable.ir);
break;
case \"11\":
team1_name.setBackgroundResource(R.drawable.rsa);
break;
case \"ZIM\":
team1_name.setBackgroundResource(R.drawable.zim);
break;
case \"63\":
team1_name.setBackgroundResource(R.drawable.kol_fl);
break;
case \"62\":
team1_name.setBackgroundResource(R.drawable.mum_fl);
break;
case \"58\":
team1_name.setBackgroundResource(R.drawable.chn_fl);
break;
case \"61\":
team1_name.setBackgroundResource(R.drawable.del_fl);
break;
case \"65\":
team1_name.setBackgroundResource(R.drawable.pun_fl);
break;
case \"64\":
team1_name.setBackgroundResource(R.drawable.raj_fl);
break;
case \"255\":
team1_name.setBackgroundResource(R.drawable.hyd_fl);
break;
case \"59\":
team1_name.setBackgroundResource(R.drawable.blr_fl);
break;
default:
team1_name.setBackgroundResource(R.drawable.otherflag);
// h_upcoming.tv_left.setText(str1);
break;
}
// second team
switch (second_team_id) {
case \"PAK\":
team2_name.setBackgroundResource(R.drawable.pak);
break;
case \"UAE\":
team2_name.setBackgroundResource(R.drawable.uae);
break;
case \"AUS\":
team2_name.setBackgroundResource(R.drawable.aus);
break;
case \"AFG\":
team2_name.setBackgroundResource(R.drawable.afg);
break;
case \"6\":
team2_name.setBackgroundResource(R.drawable.ban);
break;
case \"23\":
team2_name.setBackgroundResource(R.drawable.sco);
break;
case \"2\":
team2_name.setBackgroundResource(R.drawable.ind);
break;
case \"WI\":
team2_name.setBackgroundResource(R.drawable.wi);
break;
case \"13\":
team2_name.setBackgroundResource(R.drawable.nz);
break;
case \"SL\":
team2_name.setBackgroundResource(R.drawable.sl);
break;
case \"9\":
team2_name.setBackgroundResource(R.drawable.eng);
break;
case \"27\":
team2_name.setBackgroundResource(R.drawable.ir);
break;
case \"11\":
team2_name.setBackgroundResource(R.drawable.rsa);
break;
case \"ZIM\":
team2_name.setBackgroundResource(R.drawable.zim);
break;
case \"63\":
team2_name.setBackgroundResource(R.drawable.kol_fl);
break;
case \"62\":
team2_name.setBackgroundResource(R.drawable.mum_fl);
break;
case \"58\":
team2_name.setBackgroundResource(R.drawable.chn_fl);
break;
case \"61\":
team2_name.setBackgroundResource(R.drawable.del_fl);
break;
case \"65\":
team2_name.setBackgroundResource(R.drawable.pun_fl);
break;
case \"64\":
team2_name.setBackgroundResource(R.drawable.raj_fl);
break;
case \"255\":
team2_name.setBackgroundResource(R.drawable.hyd_fl);
break;
case \"59\":
team2_name.setBackgroundResource(R.drawable.blr_fl);
break;
default:
team1_name.setBackgroundResource(R.drawable.otherflag);
// h_upcoming.tv_left.setText(str1);
break;
}
return vi;
}
}
/* private static class CustomViewGroup extends LinearLayout {
// =============================================================================
// Child views
// =============================================================================
private TextView textView;
private ImageView imageView;
private Button button;
// =============================================================================
// Constructor
// =============================================================================
private CustomViewGroup(Context context) {
super(context);
this.setOrientation(VERTICAL);
this.textView = new TextView(context);
this.imageView = new ImageView(context);
this.button = new Button(context);
LinearLayout.LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
this.textView.setLayoutParams(layoutParams);
this.imageView.setLayoutParams(layoutParams);
this.button.setLayoutParams(layoutParams);
this.textView.setGravity(Gravity.CENTER);
this.imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
this.imageView.setAdjustViewBounds(true);
this.button.setText(\"Goto GitHub\");
this.button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(\"https://davidschreiber.github.com/FancyCoverFlow\"));
view.getContext().startActivity(i);
}
});
this.addView(this.textView);
this.addView(this.imageView);
this.addView(this.button);
}
// =============================================================================
// Getters
// =============================================================================
private TextView getTextView() {
return textView;
}
private ImageView getImageView() {
return imageView;
}
}*/
回答1:
find import android.view.ViewGroup.LayoutParams; this line and replace with import android.widget.LinearLayout.LayoutParams; this line
来源：https://stackoverflow.com/questions/30951608/java-lang-classcastexception-android-view-viewgrouplayoutparams-cannot-be-cast