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没有明显模式的随机崩溃。当我打开 ListView 时,应用程序每隔几次(随机)崩溃一次并出现以下错误。有很多东西要学,如果这是一个非常明显的错误,请原谅我。
错误日志
W/dalvikvm( 9445): threadid=1: thread exiting with uncaught exception (group=0x40018578)
E/AndroidRuntime( 9445): FATAL EXCEPTION: main
E/AndroidRuntime( 9445): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131361795, class android.widget.ListView) with Adapter(class gst.sies.popatt.LazyAdapter)]
E/AndroidRuntime( 9445): at android.widget.ListView.layoutChildren(ListView.java:1545)
E/AndroidRuntime( 9445): at android.widget.AbsListView.onLayout(AbsListView.java:1422)
E/AndroidRuntime( 9445): at android.view.View.layout(View.java:7175)
E/AndroidRuntime( 9445): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:912)
E/AndroidRuntime( 9445): at android.view.View.layout(View.java:7175)
E/AndroidRuntime( 9445): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
E/AndroidRuntime( 9445): at android.view.View.layout(View.java:7175)
E/AndroidRuntime( 9445): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
E/AndroidRuntime( 9445): at android.view.View.layout(View.java:7175)
E/AndroidRuntime( 9445): at android.view.ViewRoot.performTraversals(ViewRoot.java:1146)
E/AndroidRuntime( 9445): at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
E/AndroidRuntime( 9445): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 9445): at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 9445): at android.app.ActivityThread.main(ActivityThread.java:3687)
E/AndroidRuntime( 9445): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 9445): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 9445): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
E/AndroidRuntime( 9445): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
E/AndroidRuntime( 9445): at dalvik.system.NativeStart.main(Native Method)
D/dalvikvm( 9445): GC_CONCURRENT freed 473K, 50% free 3063K/6023K, external 714K/1025K, paused 4ms+5ms
E/liblog ( 1475): failed to call dumpstate
E/ ( 1475): Dumpstate > /data/log/dumpstate_app_error
D/InputReader( 1475): Input event: value=1
D/InputReader( 1475): Input event: value=0
D/InputReader( 1475): Input event: value=1
代码
package gst.sies.popatt;
import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class GalleryActivity extends Activity
{
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_THUMB_URL = "thumb_url";
public Typeface myTypeface;
private ArrayList<HashMap<String, String>> nomineeList;
private ListView n_list;
private Intent back_button;
private String[] category;
private LazyAdapter adapter;
private int category_index;
private SQLiteDatabase db;
private SharedPreferences prefs;
private TextView voted;
private UserLoginTask getNominees;
private ImageView iv;
private boolean date;
int i=0;
@SuppressLint("SdCardPath")
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
String title = getIntent().getStringExtra("title");
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
{
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
}
else
this.setTitle(title);
setContentView(R.layout.activity_gallery);
myTypeface = Typeface.createFromAsset(
this.getAssets(),
"ROBOTO.TTF");
prefs= new ObscuredSharedPreferences(
GalleryActivity.this, GalleryActivity.this.getSharedPreferences("gst.sies.popatt", Context.MODE_PRIVATE) );
back_button= new Intent (GalleryActivity.this, CategoriesActivity.class);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
voted = (TextView) findViewById(R.id.textView3);
else
voted = (TextView) findViewById(R.id.TextView_14);
iv= (ImageView) findViewById(R.id.voted_thumbnail);
category_index = getIntent().getIntExtra("category_index", 0);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
{
TextView tv = (TextView) findViewById(R.id.textView1);
tv.setTypeface(myTypeface);
tv.setText(title);
voted.setTypeface(myTypeface);
}
if(prefs.getString(Integer.toString(category_index), "NA").equals("NA"))
voted.setText("Voted for: No One");
else
{
iv.setImageResource(R.drawable.radio_checked);
//voted.setText("Voted for: "+ prefs.getString(Integer.toString(category_index), "No One"));
voted.setText("can't do it yet ;)");
voted.setSelected(true);
}
Calendar now = Calendar.getInstance();
if(now.get(Calendar.DATE) >= 1 && now.get(Calendar.DATE) <= 18)
date = true;
else
date = false;
nomineeList = new ArrayList<HashMap<String, String>>();
File nom_db = new File (Environment.getExternalStorageDirectory()+"/Android/data/gst.sies.popatt/databases/nominees.db");
db = SQLiteDatabase.openOrCreateDatabase(nom_db, null);
getNominees = new UserLoginTask();
getNominees.execute((Void) null);
n_list = (ListView) findViewById(R.id.nominee_list);
adapter=new LazyAdapter(this, nomineeList);
adapter.notifyDataSetChanged();
n_list.setAdapter(adapter);
n_list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String votedOne = (String) ((TextView) view.findViewById(R.id.title)).getText();
prefs.edit().putString(Integer.toString(category_index), votedOne).commit();
if(date)
voted.setText("Voted for: "+ votedOne);
else
voted.setText("can't do it yet ;)");
voted.setSelected(true);
iv.setImageResource(R.drawable.radio_checked);
}
});
}
@Override
public void onBackPressed()
{
startActivity(back_button);
finish();
}
public boolean isTableExists(String tableName) {
Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '"+tableName+"'", null);
if(cursor!=null) {
if(cursor.getCount()>0) {
cursor.close();
return true;
}
cursor.close();
}
return false;
}
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
Resources res = getResources();
category = res.getStringArray(R.array.category_list_short);
if(isTableExists(category[category_index]) && date)
{
Cursor c = db.rawQuery("SELECT * FROM "+category[category_index]+" WHERE name IS NOT NULL", null);
if(c.moveToFirst())
{
while(!c.isAfterLast())
{
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_ID, c.getString(0));
map.put(KEY_TITLE, c.getString(c.getColumnIndex("name")));
map.put(KEY_THUMB_URL, c.getString(c.getColumnIndex("url")));
nomineeList.add(map);
c.moveToNext();
}
c.close();
return true;
}
}
else
{
for (int i = 0; i < 10 ; i++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_ID, Integer.toString(i));
map.put(KEY_TITLE, "No Name Available");
map.put(KEY_THUMB_URL, "https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-snc6/5939_10151499921443518_604230176_s.jpg");
nomineeList.add(map);
}
return true;
}
return true;
}
@Override
protected void onPostExecute(Boolean success) {
super.onPostExecute(success);
runOnUiThread(new Runnable() {
public void run() {
db.close();
adapter.notifyDataSetChanged();
}
});
}
@Override
protected void onCancelled() {
}
@Override
protected void onPreExecute()
{ }
}
}
适配器类
package gst.sies.popatt;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class LazyAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
//rbState = new boolean [100];
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.rowview, null);
TextView title = (TextView)vi.findViewById(R.id.title); // title
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
GalleryActivity gl = new GalleryActivity();
title.setTypeface(gl.myTypeface);
HashMap<String, String> nominee = new HashMap<String, String>();
nominee = data.get(position);
title.setText(nominee.get(GalleryActivity.KEY_TITLE));
imageLoader.DisplayImage(nominee.get(GalleryActivity.KEY_THUMB_URL),R.drawable.ic_launcher, thumb_image);
return vi;
}
}
老实说,我没有尝试太多,因为我不知道可能是什么问题。
编辑:更新代码
package gst.sies.popatt;
import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class GalleryActivity extends Activity
{
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_THUMB_URL = "thumb_url";
public Typeface myTypeface;
private ArrayList<HashMap<String, String>> nomineeList;
private ListView n_list;
private Intent back_button;
private String[] category;
private LazyAdapter adapter;
private int category_index;
private SQLiteDatabase db;
private SharedPreferences prefs;
private TextView voted;
private UserLoginTask getNominees;
private ImageView iv;
private boolean date;
int i=0;
@SuppressLint("SdCardPath")
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
String title = getIntent().getStringExtra("title");
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
{
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
}
else
this.setTitle(title);
setContentView(R.layout.activity_gallery);
myTypeface = Typeface.createFromAsset(
this.getAssets(),
"ROBOTO.TTF");
prefs= new ObscuredSharedPreferences(
GalleryActivity.this, GalleryActivity.this.getSharedPreferences("gst.sies.popatt", Context.MODE_PRIVATE) );
back_button= new Intent (GalleryActivity.this, CategoriesActivity.class);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
voted = (TextView) findViewById(R.id.textView3);
else
voted = (TextView) findViewById(R.id.TextView_14);
iv= (ImageView) findViewById(R.id.voted_thumbnail);
category_index = getIntent().getIntExtra("category_index", 0);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
{
TextView tv = (TextView) findViewById(R.id.textView1);
tv.setTypeface(myTypeface);
tv.setText(title);
voted.setTypeface(myTypeface);
}
if(prefs.getString(Integer.toString(category_index), "NA").equals("NA"))
voted.setText("Voted for: No One");
else
{
iv.setImageResource(R.drawable.radio_checked);
//voted.setText("Voted for: "+ prefs.getString(Integer.toString(category_index), "No One"));
voted.setText("can't do it yet ;)");
voted.setSelected(true);
}
Calendar now = Calendar.getInstance();
if(now.get(Calendar.DATE) >= 1 && now.get(Calendar.DATE) <= 18)
date = true;
else
date = false;
nomineeList = new ArrayList<HashMap<String, String>>();
File nom_db = new File (Environment.getExternalStorageDirectory()+"/Android/data/gst.sies.popatt/databases/nominees.db");
db = SQLiteDatabase.openOrCreateDatabase(nom_db, null);
getNominees = new UserLoginTask();
getNominees.execute((Void) null);
n_list = (ListView) findViewById(R.id.nominee_list);
adapter=new LazyAdapter(this, nomineeList);
n_list.setAdapter(adapter);
adapter.notifyDataSetChanged();
n_list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String votedOne = (String) ((TextView) view.findViewById(R.id.title)).getText();
prefs.edit().putString(Integer.toString(category_index), votedOne).commit();
if(date)
voted.setText("Voted for: "+ votedOne);
else
voted.setText("can't do it yet ;)");
voted.setSelected(true);
iv.setImageResource(R.drawable.radio_checked);
}
});
}
@Override
public void onBackPressed()
{
startActivity(back_button);
finish();
}
public boolean isTableExists(String tableName) {
Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '"+tableName+"'", null);
if(cursor!=null) {
if(cursor.getCount()>0) {
cursor.close();
return true;
}
cursor.close();
}
return false;
}
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
Resources res = getResources();
category = res.getStringArray(R.array.category_list_short);
if(isTableExists(category[category_index]) && date)
{
Cursor c = db.rawQuery("SELECT * FROM "+category[category_index]+" WHERE name IS NOT NULL", null);
if(c.moveToFirst())
{
while(!c.isAfterLast())
{
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_ID, c.getString(0));
map.put(KEY_TITLE, c.getString(c.getColumnIndex("name")));
map.put(KEY_THUMB_URL, c.getString(c.getColumnIndex("url")));
nomineeList.add(map);
c.moveToNext();
}
c.close();
return true;
}
}
else
{
for (int i = 0; i < 10 ; i++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_ID, Integer.toString(i));
map.put(KEY_TITLE, "No Name Available");
map.put(KEY_THUMB_URL, "https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-snc6/5939_10151499921443518_604230176_s.jpg");
nomineeList.add(map);
}
return true;
}
return true;
}
@Override
protected void onPostExecute(Boolean success) {
super.onPostExecute(success);
db.close();
}
@Override
protected void onCancelled() {
}
@Override
protected void onPreExecute()
{ }
}
}
最佳答案
将适配器设置为 ListView 后调用notifyDataSetChanged()即
adapter=new LazyAdapter(this, nomineeList)
n_list.setAdapter(adapter);
adapter.notifyDataSetChanged();
因为您正在调用 notifyDataSetChanged() 即使您的 LazyAdapter 数据没有变化
adapter=new LazyAdapter(this, nomineeList);
adapter.notifyDataSetChanged();
notifyDataSetChanged()
- 将通知 ListView 适配器中的数据已更改的通知。当您尝试在尚未绑定(bind)到 listView 的 Adapter 上调用 notifyDataSetChanged() 时,将抛出此异常。
java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread.
关于android - 由于 notifyDataSetChanged() 问题随机崩溃,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15730337/
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