我有一些问题，我无法在模拟器中重新创建，但我一直在Android市场获得错误报告，我不知道如何解决...其他任何人可能会看到它是非常好的
有时会重新发布
java.lang.NullPointerException
at android.webkit.WebViewDatabase.getCacheTotalSize(WebViewDatabase.java:734)
at android.webkit.CacheManager.trimCacheIfNeeded(CacheManager.java:548)
at android.webkit.WebViewWorker.handleMessage(WebViewWorker.java:190)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.os.HandlerThread.run(HandlerThread.java:60)
有时候这个报告
java.lang.RuntimeException: Unable to start activity ComponentInfo{polis.koll/polis.koll.WebPageLoader}: java.lang.IllegalArgumentException: provider==null
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2737)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2753)
at android.app.ActivityThread.access$2500(ActivityThread.java:129)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:143)
at android.app.ActivityThread.main(ActivityThread.java:4701)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: provider==null
at android.location.LocationManager.requestLocationUpdates(LocationManager.java:625)
at polis.koll.WebPageLoader.getLocation(WebPageLoader.java:54)
at polis.koll.WebPageLoader.onCreate(WebPageLoader.java:70)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2701)
这是我的代码
public class WebPageLoader extends Activity implements LocationListener{
public static String Android_ID = null;
final Activity activity = this;
private Location mostRecentLocation;
private void CheckEnableGPS(){
String provider = Settings.Secure.getString(getContentResolver(),
Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.equals("")){
//GPS Enabled
getLocation();
}else{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
}
private void getLocation() {
String provider = Settings.Secure.getString(getContentResolver(),
Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.equals("")){
LocationManager locationManager =
(LocationManager)getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
String bestprovider = locationManager.getBestProvider(criteria,true);
locationManager.requestLocationUpdates(bestprovider, 1, 500, this);
mostRecentLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}else{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
}
@Override
public void onCreate(Bundle savedInstanceState)
{
//AdManager.setTestDevices( new String[] { AdManager.TEST_EMULATOR } );
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
getLocation();
Android_ID = Secure.getString(getContentResolver(), Secure.ANDROID_ID);
WebView webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
/** Allows JavaScript calls to access application resources **/
webView.addJavascriptInterface(new JavaScriptInterface(), "android16");
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
activity.setTitle("Letar poliskontroller");
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
// Handle the error
}
// Testade att ta bort denna override för att få market länkar att fungera
// @Override
// public boolean shouldOverrideUrlLoading(WebView view, String url)
// {
// view.loadUrl(url);
// return true;
// }
});
if (Locale.getDefault().getLanguage().equals("sv")){
//webView.loadUrl("file:///android_asset/android.html");
webView.loadUrl("file:///android_asset/findgps_sv.html");
}else{
//webView.loadUrl("http://m.bryggplatsen.se/android/polis/index.php");
//webView.loadUrl("file:///android_asset/android_en.html");
webView.loadUrl("file:///android_asset/findgps_en.html");
}
}
/** Sets up the interface for getting access to Latitude and Longitude data from device
**/
private class JavaScriptInterface {
public double getLatitude(){
return mostRecentLocation != null ? mostRecentLocation.getLatitude() : Double.NaN;
}
public double getLongitude(){
return mostRecentLocation != null ? mostRecentLocation.getLongitude() : Double.NaN;
}
public String getAndroid_ID(){
return Android_ID;
}
public void sharethisapp(){
startActivity(Intent.createChooser(sharespotIntent(), "Share this warning"));
}
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
getLocation();
//CheckEnableGPS();
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
getLocation();
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
getLocation();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
getLocation();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
MenuItem item = menu.add("Shut down");
item.setIcon(R.drawable.exit);
item = menu.add("Share");
item.setIcon(R.drawable.m_share);
item = menu.add("Fix GPS");
item.setIcon(R.drawable.globe);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getTitle() == "Shut down") {
System.exit(0);
finish();
}
if (item.getTitle() == "Fix GPS") {
getLocation();
}
if (item.getTitle() == "Share") {
if (Locale.getDefault().getLanguage().equals("sv")){
startActivity(Intent.createChooser(shareIntent(), "Dela denna app"));
}else{
startActivity(Intent.createChooser(shareIntent(), "Share this app"));
}
}
return true;
}
private Intent shareIntent() {
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("text/plain");
if (Locale.getDefault().getLanguage().equals("sv")){
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Testa denna android app...");
return shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "index.php");
}else{
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Try this cool android app...");
return shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "index_en.php");
}
}
private Intent sharespotIntent() {
Intent sharespotIntent = new Intent(android.content.Intent.ACTION_SEND);
sharespotIntent.setType("text/plain");
if (Locale.getDefault().getLanguage().equals("sv")){
sharespotIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, " la just upp en ny varning i appen Polisradar");
return sharespotIntent.putExtra(android.content.Intent.EXTRA_TEXT, "warn.php?lat=" + mostRecentLocation.getLatitude() + "&lng=" + mostRecentLocation.getLongitude() + "");
}else{
sharespotIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, " just added a new warning in the app Policeradar");
return sharespotIntent.putExtra(android.content.Intent.EXTRA_TEXT, "warn_en.php?lat=" + mostRecentLocation.getLatitude() + "&lng=" + mostRecentLocation.getLongitude() + "");
}
}
}
答案 0 :(得分：1)
如果请求的名称不在数据库中，则Settings.Secure.getString（）方法可以返回null。我不知道为什么找不到Settings.Secure.LOCATION_PROVIDERS_ALLOWED。但是，在检查提供程序不是空字符串之前，您的代码不会检查（在getLocation（）中）提供程序不为null。我认为这是你的第二个例外的来源。
在框架深处看似随机错误也可能是因为尝试在不支持代码中的某些内容的操作系统版本上运行您的应用程序。确保您的代码针对您在清单中设置的minSdkVersion进行编译，而不仅仅是targetSdkVersion。
答案 1 :(得分：1)
关于这个问题的一点说明。我不知道这是不是你的问题，但我正在考虑在应用程序之间共享一些文件，并尝试修改AndroidManifest.xml文件中的android:sharedUserId属性。一旦我这样做，我得到的报告完全相同，我的应用程序无法正常启动（由于AdRequest失败，似乎）。即使从清单中删除sharedUserId属性后，我仍然会收到错误，但我认为它来自首选项数据库。
底线是在部署应用程序后不更改应用程序的sharedUserId属性，或者您需要卸载/重新安装周期才能使所有内容重新运行。