如何修复此ArrayAdapter要求资源ID为TextView [英] How to fix this ArrayAdapter requires the resource ID to be a TextView
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问题描述
我是Android新手，我正在尝试使用json开发带有gridview和listview的应用程序.通过json，我在gridview中显示了一组图像，并基于gridview的位置，将结果显示在下一页即listview中.这是我的Sub_Category.java(第二页Java文件)
I am new to android, I'm trying to develop an application with gridview and listview using json. Through json I displayed set of images in gridview and based on the position of the gridview, i am displaying the results in the next page which is listview. This is my Sub_Category.java (2nd page java file)
package com.javatechig.gridviewexample;
public class Sub_Categories extends ActionBarActivity {
private ArrayList<GridItem> SubCatgyData;
private static final String TAG = Sub_Categories.class.getSimpleName();
public String TAG1 = "Value for ID";
public String TAG2 = "Value for subCategory";
public String TAG4 = "Value for subCategory in main method";
public String TAG3 = "DONE";
public String categoryID;
private ProgressBar mProgressBar;
private ListView listView;
public String subURL = "http://www.prateektechnosoft.com/justcall/cities/gridsubcategories/chennai/";
public String URLwithID;
private ListAdapter mListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub__categories);
categoryID = getIntent().getStringExtra("ID");
Log.e(TAG1, categoryID);
SubCatgyData = new ArrayList<>();
URLwithID = subURL + categoryID;
mProgressBar = (ProgressBar) findViewById(R.id.progressBar2);
Log.e(TAG3, "Before Execute");
new AsyncHttpTask().execute(URLwithID);
Log.d(TAG4, String.valueOf(SubCatgyData.size()));
Log.e(TAG3, "After Execute");
mProgressBar.setVisibility(View.VISIBLE);
listView=(ListView) findViewById(R.id.listView2);
ArrayAdapter adapter = new ArrayAdapter(Sub_Categories.this,android.R.layout.simple_list_item_2,SubCatgyData);
listView.setAdapter(adapter);
}
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
@Override
protected Integer doInBackground(String... params) {
Integer result = 0;
try {
// Create Apache HttpClient
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet(params[0]));
int statusCode = httpResponse.getStatusLine().getStatusCode();
// 200 represents HTTP OK
if (statusCode == 200) {
String response = streamToString(httpResponse.getEntity().getContent());
parseResult(response);
result = 1; // Successful
} else {
result = 0; //"Failed
}
} catch (Exception e) {
Log.d(TAG, e.getLocalizedMessage());
}
runOnUiThread(new Runnable() {
public void run() {
listView = (ListView) findViewById(R.id.listView2);
ArrayAdapter adapter = new ArrayAdapter(Sub_Categories.this, android.R.layout.list_content, SubCatgyData);
listView.setAdapter(adapter);
}
});
Log.e(TAG3, "Done in do background methid");
return result;
}
@Override
protected void onPostExecute(Integer result) {
// Download complete. Lets update UI
if (result == 0) {
Toast.makeText(Sub_Categories.this, "Failed to fetch data!", Toast.LENGTH_SHORT).show();
}
//Hide progressbar
mProgressBar.setVisibility(View.GONE);
Log.e(TAG3, "Done in onPostExecute methid");
}
}
String streamToString(InputStream stream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
String line;
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
// Close stream
if (null != stream) {
stream.close();
}
Log.e(TAG3, "Done in streamTOString methid");
return result;
}
private void parseResult(String result) {
try {
//JSONObject response = new JSONObject(result);
JSONArray posts = new JSONArray(result);
GridItem item;
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.optJSONObject(i);
String catid = post.optString("suB_CATEGORYNAME");
item = new GridItem();
item.setID(catid);
SubCatgyData.add(item);
}
Log.d(TAG2, String.valueOf(SubCatgyData.size()));
} catch (JSONException e) {
e.printStackTrace();
}
Log.e(TAG3, "Done in parseResult methid");
return;
}
}
这是我的布局文件.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.javatechig.gridviewexample.Sub_Categories">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/progressBar2"
android:layout_centerInParent="true"
android:visibility="gone"/>
</RelativeLayout>
这是我的日志.我无法解决此错误.请帮我.
This is my LOG. I can't fix this error. Please help me.
12-15 11:44:33.528 25575-25575/com.javatechig.gridviewexample E/ArrayAdapter: You must supply a resource ID for a TextView
12-15 11:44:33.528 25575-25575/com.javatechig.gridviewexample D/AndroidRuntime: Shutting down VM
12-15 11:44:33.529 25575-25575/com.javatechig.gridviewexample E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.javatechig.gridviewexample, PID: 25575
java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:393)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1280)
at android.widget.ListView.onMeasure(ListView.java:1188)
at android.view.View.measure(View.java:18788)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
at android.view.View.measure(View.java:18788)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1216)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.ClassCastException: android.widget.FrameLayout cannot be cast to android.widget.TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:386)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1280)
at android.widget.ListView.onMeasure(ListView.java:1188)
at android.view.View.measure(View.java:18788)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
at android.view.View.measure(View.java:18788)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1216)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
预先感谢
推荐答案
由于您使用的是默认的ListView和ArrayAdapter，并且只有一个数据列表，即 SubCatgyData ，使用android.R.layout.simple_list_item_1而不是android.R.layout.simple_list_item_2.
Since you are using the default ListView and ArrayAdapter, and you have only one data list, ie SubCatgyData, you should be using android.R.layout.simple_list_item_1 instead of android.R.layout.simple_list_item_2.
两者之间的区别是android.R.layout.simple_list_item_1内部只有一个TextView，而android.R.layout.simple_list_item_2有两个TextView.
The difference between the two is android.R.layout.simple_list_item_1 has only one TextView inside it, while android.R.layout.simple_list_item_2 has two TextView.
ArrayAdapter adapter = new ArrayAdapter(Sub_Categories.this,android.R.layout.simple_list_item_1,SubCatgyData);
这篇关于如何修复此ArrayAdapter要求资源ID为TextView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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