我在较旧的Android手机（Android 4.4.2）上运行我的应用时出现此错误。该代码在新手机（Android 5.0）上运行，并且不会抛出错误。这是完整的错误。
java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
at android.widget.GridView.onMeasure(GridView.java:1051)
at android.view.View.measure(View.java:17388)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17388)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:17388)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17388)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5353)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2533)
at android.view.View.measure(View.java:17388)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2217)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1354)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1553)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1238)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6473)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
at android.view.Choreographer.doCallbacks(Choreographer.java:603)
at android.view.Choreographer.doFrame(Choreographer.java:573)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5356)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
当我尝试在我的XML布局中找到GridView并将其放入MainActivity.java中的ViewGroup时，就会发生这种情况。
继承我的主要活动：
package com.example.eric.myapplication;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.GZIPInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import android.app.Activity;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Point;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;
import android.view.Display;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.OrientationEventListener;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.GridView;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupMenu;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.gson.Gson;
import com.parse.FindCallback;
import com.parse.GetDataCallback;
import com.parse.LogInCallback;
import com.parse.Parse;
import com.parse.ParseAnalytics;
import com.parse.ParseAnonymousUtils;
import com.parse.ParseException;
import com.parse.ParseFile;
import com.parse.ParseInstallation;
import com.parse.ParseObject;
import com.parse.ParsePush;
import com.parse.ParseQuery;
import com.parse.ParseUser;
import com.parse.ParseFacebookUtils;
import com.parse.SaveCallback;
import android.widget.AbsListView.LayoutParams;
import org.w3c.dom.Text;
import javax.crypto.spec.IvParameterSpec;
public class MainActivity extends Activity implements OnClickListener {
Button settings;
GridView mGridView;
ArrayList<String> abc;
public static final String MyPreferences = "MyPrefs";
ContactAdapter adapter;
public int width;
public int height;
private boolean startPortrait;
private float x1, x2;
private ArrayList<String> extras;
private LinearLayout mView;
private ViewGroup viewGroup;
private RelativeLayout mAppBanner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mView = (LinearLayout) getLayoutInflater().inflate(R.layout.activity_main, null, false);
mAppBanner = (RelativeLayout) mView.findViewById(R.id.mAppBanner);
((ImageView) mAppBanner.findViewById(R.id.titleImage)).setImageResource(R.drawable.mbanner);
viewGroup = mView;
mGridView = (GridView) mView.findViewById(R.id.gridView1);
abc = new ArrayList<String>();
viewGroup.removeView(mAppBanner);
viewGroup.removeView(mGridView);
viewGroup.addView(mAppBanner);
viewGroup.addView(mGridView);
setContentView(viewGroup);
AssetCopier ac = new AssetCopier(getAssets());
ac.start();
sharedPreferences = getSharedPreferences(MyPreferences, Context.MODE_PRIVATE);
//Start Packages Download
extras = new ArrayList<String>();
if(!sharedPreferences.contains("downloadedPackages")) {
ArrayList<String> downloadedPackages = new ArrayList<String>();
SharedPreferences.Editor prefsEditor = sharedPreferences.edit();
Gson gson = new Gson();
String json = gson.toJson(downloadedPackages);
prefsEditor.putString("downloadedPackages", json);
prefsEditor.commit();
}
if(!sharedPreferences.contains("downloadedEmojis")) {
ArrayList<String> downloadedEmojis = new ArrayList<String>();
SharedPreferences.Editor prefsEditor = sharedPreferences.edit();
Gson gson = new Gson();
String json = gson.toJson(downloadedEmojis);
prefsEditor.putString("downloadedEmojis", json);
prefsEditor.commit();
}
final String packagesDirPath = Environment.getExternalStorageDirectory().toString() + File.separator + ".mogeePacks";
File packagesDirFile = new File(packagesDirPath);
if(!packagesDirFile.exists()) {
packagesDirFile.mkdirs();
}
final Gson gson = new Gson();
String json = sharedPreferences.getString("downloadedPackages", "");
final ArrayList<String> downloadedPackages = gson.fromJson(json, ArrayList.class);
ParseQuery<ParseObject> query = ParseQuery.getQuery("Mogees");
query.whereNotContainedIn("name", downloadedPackages);
query.whereEqualTo("OS","android");
String ejson = sharedPreferences.getString("downloadedEmojis", "");
final ArrayList<String> downloadedEmojis = gson.fromJson(ejson, ArrayList.class);
query.findInBackground(new FindCallback<ParseObject>() {
public void done(final List<ParseObject> packageList, ParseException e) {
if(packageList!=null && !packageList.isEmpty()) {
for (ParseObject p : packageList) {
final ParseObject po = p;
final String pDirPath = Environment.getExternalStorageDirectory().toString() + File.separator + ".mogeePacks" + File.separator + p.getObjectId();
File pDirFile = new File(pDirPath);
pDirFile.mkdirs();
ParseFile f = (ParseFile) p.get("mogeeBundle");
f.getDataInBackground(new GetDataCallback() {
public void done(byte[] data, ParseException e) {
if (e == null) {
try {
InputStream input = new ByteArrayInputStream(data);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(input));
byte[] buffer = new byte[1024];
ZipEntry ze;
int count;
String filename;
while ((ze = zis.getNextEntry()) != null) {
filename = ze.getName();
FileOutputStream fout = new FileOutputStream(pDirPath + File.separator + filename);
while ((count = zis.read(buffer)) != -1) {
fout.write(buffer, 0, count);
}
fout.close();
zis.closeEntry();
downloadedEmojis.add(pDirPath + File.separator + filename);
}
zis.close();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
} else {
Log.i("ParseException",e.getMessage());
}
if(downloadedPackages.size()==1) {
downloadedPackages.add((String) po.get("name"));
endOnCreate(downloadedEmojis,downloadedPackages);
} else {
downloadedPackages.add((String) po.get("name"));
}
}
});
}
} else {
extras = downloadedEmojis;
endOnCreate(null,null);
}
}
});
}
public void endOnCreate(ArrayList<String> downloadedEmojis,ArrayList<String> downloadedPackages) {
if(downloadedEmojis!=null && downloadedPackages!=null) {
final Gson gson = new Gson();
SharedPreferences.Editor prefsEditor = sharedPreferences.edit();
String json1 = gson.toJson(downloadedEmojis);
prefsEditor.putString("downloadedEmojis", json1);
String json2 = gson.toJson(downloadedPackages);
prefsEditor.putString("downloadedPackages", json2);
prefsEditor.commit();
extras = downloadedEmojis;
}
setValue();
final Activity mainActivity = this;
/*runOnUiThread(new Runnable() {
@Override
public void run() {*/
adapter = new ContactAdapter(getApplicationContext(), 0, abc, extras, mainActivity);
mGridView.setAdapter(adapter);
/* }
});*/
mGridView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
x1 = event.getX();
break;
case MotionEvent.ACTION_UP:
x2 = event.getX();
break;
}
return false;
}
});
mGridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(Math.abs(x1-x2)<adapter.getScale()*128) {
String path;
if(position<ContactAdapter.mThumbIds.length) {
path = Environment.getExternalStorageDirectory().toString()
+ File.separator + ".GIF" + "/" + ContactAdapter.mThumbIds[position].getName() + ".gif";
Map<String, String> dimensions = new HashMap<String, String>();
dimensions.put("name", ContactAdapter.mThumbIds[position].getEasyname());
dimensions.put("platform", "app");
ParseAnalytics.trackEventInBackground("mogee", dimensions);
} else {
path = extras.get(position-ContactAdapter.mThumbIds.length);
}
sendGif(path);
}
}
});
runOnUiThread(new Runnable() {
@Override
public void run() {
WindowManager wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
int col_wd;
if (getResources().getConfiguration().orientation == getResources().getConfiguration().ORIENTATION_PORTRAIT) {
col_wd = (int) (width / 4.0f);
adapter.setOrientation(true, width);
findViewById(R.id.gridView1).invalidate();
startPortrait = true;
} else {
col_wd = (int) (width / 7.0f);
adapter.setOrientation(false, width);
findViewById(R.id.gridView1).invalidate();
startPortrait = false;
}
mGridView.setColumnWidth(col_wd);
}
});
settings = (Button) findViewById(R.id.settings);
settings.setOnClickListener(this);
Map<String, String> dimensions = new HashMap<String, String>();
dimensions.put("platform", "app");
ParseAnalytics.trackAppOpenedInBackground(getIntent());
ParseAnalytics.trackEventInBackground("launched", dimensions);
FacebookSdk.sdkInitialize(getApplicationContext());
ParseFacebookUtils.initialize(getApplicationContext());
ParsePush.subscribeInBackground("", new SaveCallback() {
@Override
public void done(ParseException e) {
if (e == null) {
Log.d("com.parse.push", "successfully subscribed to the broadcast channel.");
} else {
Log.e("com.parse.push", "failed to subscribe for push", e);
}
}
});
}
public ArrayList<String> getExtras() {
return extras;
}
@Override
public void onClick(View view) {
ParseFacebookUtils.initialize(getApplicationContext());
switch(view.getId()) {
case R.id.settings:
// take user to the settings pop up menu
final PopupMenu popup = new PopupMenu(MainActivity.this, settings);
popup.getMenuInflater().inflate(R.menu.main, popup.getMenu());
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.tutorial:
break;
case R.id.faq:
break;
case R.id.feedback:
break;
}
return true;
}
});
popup.show();
break;
}
}
public void onLowmemory() {
Runtime.getRuntime().gc();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.tutorial:
break;
case R.id.faq:
break;
case R.id.feedback:
break;
}
return true;
}
public void sendGif(String path) {
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/*");
File imageFileToShare = new File(path);
Uri uri = Uri.fromFile(imageFileToShare);
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share Image!"));
}
private void sendLink() {
Intent intent = new Intent(Intent.ACTION_SEND);
String url = new String("Check out my new app...");
intent.putExtra(Intent.EXTRA_TEXT, url);
intent.setType("text/plain");
startActivity(Intent.createChooser(intent, "Share This App!"));
}
public void setValue(){
for (int i = 0; i < ContactAdapter.mThumbIds.length+extras.size(); i++) {
abc.add(i+"");
}
}
class RotateListener extends OrientationEventListener {
public RotateListener() {
super(getApplicationContext());
}
@Override
public void onOrientationChanged(int i) {
int w;
int h;
if(startPortrait) {
w = width;
h = height;
} else {
h = width;
w = height;
}
if (i == 270 || i == 90) {
adapter.setOrientation(false, h);
int col_wd = (int) (h / 7.0f);
mGridView.setColumnWidth(col_wd);
} else {
adapter.setOrientation(true, w);
int col_wd = (int) (w / 4.0f);
mGridView.setColumnWidth(col_wd);
}
mGridView.invalidate();
}
}
}
以下是主要活动XML文件：
<?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="fill_parent"
android:orientation="vertical"
android:layout_gravity="center">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mAppBanner"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:orientation="vertical">
<ImageView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/titleImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:visibility="visible"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:scaleType="fitXY"
android:layout_alignParentBottom="true" />
<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_gravity="left"
android:background="#00ffffff"
android:id="@+id/settings"
android:text="Settings"
android:textColor="#FFFFFF"
android:onClick="onButtonClick"
android:gravity="center"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:paddingRight="0dp"
android:paddingLeft="8dp"
android:paddingTop="10dp"
android:paddingBottom="0dp" />
</RelativeLayout>
<GridView
android:id="@+id/gridView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:verticalSpacing="0dp"
android:horizontalSpacing="0dp"
android:stretchMode="none"
android:scaleType="center"
android:gravity="center"
android:clipChildren="true"
android:drawSelectorOnTop="false"
android:layout_margin="0dp"
android:background="#FFFFFF"
android:listSelector="#FFFFFF"
android:layout_alignParentRight="true"
android:scrollbars="none"
android:layout_alignParentEnd="true">
</GridView>
</LinearLayout>
这是我的联系适配器类：
package com.example.eric.myapplication;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.util.LruCache;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.view.WindowManager;
import android.view.Display;
import android.graphics.Point;
import android.widget.Toast;
import com.phronesistechne.mogeeapp.widget.GifMovieView;
/**
* An array adapter that knows how to render views when given CustomData classes
*/
public class ContactAdapter extends ArrayAdapter<String> {
private LayoutInflater mInflater;
Context mContext;
ArrayList<String> mlist;
//ArrayList<View> viewCache;
private LruCache moviecache;
private Activity mainActivity;
private boolean portrait;
private int width;
private final ExecutorService executorService = Executors.newCachedThreadPool();
private float scale;
private ArrayList<String> extras;
private ArrayList<GifMovieView> gifs;
public float getScale() {
return scale;
}
@TargetApi(13)
public ContactAdapter(Context paramContext, int paramInt,
ArrayList<String> jobList, ArrayList<String> ex, Activity mA) {
super(paramContext, paramInt);
this.mContext = paramContext;
this.mlist = ((ArrayList) jobList);
mInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int cachesize = 1024*1024*64;
moviecache = new LruCache(cachesize);
gifs = new ArrayList<GifMovieView>();
portrait = true;
extras = ex;
mainActivity = mA;
}
public int getCount() {
return this.mlist.size();
}
@Override
@TargetApi(13)
public View getView(final int position, View convertView, ViewGroup parent) {
//final Holder holder;
//if (convertView == null) {
convertView = mInflater.inflate(R.layout.image, parent, false);
GifMovieView image = (GifMovieView) convertView.findViewById(R.id.gif1);
image.setActivity(mainActivity);
if (portrait) {
image.setScale(width);
} else {
image.setLandscapeScale(width);
}
scale = image.getScale();
if(position < mThumbIds.length) {
image.setMovieResource(mThumbIds[position].getId());
} else {
image.setMovieResource(extras.get(position-mThumbIds.length));
}
gifs.add(image);
return image;
/*try {
gifs.set(position, holder.image);
} catch (IndexOutOfBoundsException e) {
gifs.add(position, holder.image);
}*/
}
/** View holder for the views we need access to */
public static class Holder {
public GifMovieView image;
}
public void changePausedState() {
for(GifMovieView g : gifs) {
g.setPaused(!g.isPaused());
}
}
public void setOrientation(boolean p, int w) {
portrait = p;
width = w;
}
public static Emojis [] mThumbIds= {
new Emojis(R.drawable.wavingsmile_1029a, R.drawable.preview_wavingsmile_1029a, "wavingsmile_1029a", "wavingsmile"),
new Emojis(R.drawable.wink_1032a, R.drawable.preview_wink_1035a, "wink_1032a", "wink")
};
}
答案 0 :(得分：1)
I fixed my problem, in my contact adapter I was returning the wrong view inside of the getView() function. Changing 'return image;' to 'return convertView;' fixed the problem for me, and it works on all the devices I have been able to test.