catch (UnknownHostException e) {
e.printStackTrace();
progressDialog.dismiss();
AlertDialog connection = new AlertDialog.Builder(
NewsScreenActivity.this)
.setTitle("No Network Found")
.setMessage(
"Internet Connection Reqired To Use this Application,please try again latter")
.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// progressDialog.dismiss();
}
}).create();
connection.show();
Log.i("=================== UnknownHostException", "======");
}
错误：
10-06 17:35:02.488: W/System.err(20393): java.net.UnknownHostException: maritimeglobalnews.com
10-06 17:35:02.488: W/System.err(20393): at java.net.InetAddress.lookupHostByName(InetAddress.java:506)
10-06 17:35:02.488: W/System.err(20393): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:294)
10-06 17:35:02.488: W/System.err(20393): at java.net.InetAddress.getAllByName(InetAddress.java:256)
10-06 17:35:02.488: W/System.err(20393): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:136)
10-06 17:35:02.488: W/System.err(20393): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
10-06 17:35:02.488: W/System.err(20393): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
10-06 17:35:02.498: W/System.err(20393): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:359)
10-06 17:35:02.498: W/System.err(20393): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
10-06 17:35:02.498: W/System.err(20393): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
10-06 17:35:02.498: W/System.err(20393): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
10-06 17:35:02.498: W/System.err(20393): at com.MariTimeGlobalNews.NewsScreenActivity.getData(NewsScreenActivity.java:248)
10-06 17:35:02.498: W/System.err(20393): at com.MariTimeGlobalNews.NewsScreenActivity$AllDataAsyn.doInBackground(NewsScreenActivity.java:138)
10-06 17:35:02.508: W/System.err(20393): at com.MariTimeGlobalNews.NewsScreenActivity$AllDataAsyn.doInBackground(NewsScreenActivity.java:1)
10-06 17:35:02.508: W/System.err(20393): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-06 17:35:02.508: W/System.err(20393): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
10-06 17:35:02.508: W/System.err(20393): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
10-06 17:35:02.508: W/System.err(20393): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
10-06 17:35:02.508: W/System.err(20393): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
10-06 17:35:02.508: W/System.err(20393): at java.lang.Thread.run(Thread.java:1019)
10-06 17:35:02.538: W/dalvikvm(20393): threadid=9: thread exiting with uncaught exception (group=0x40018560)
10-06 17:35:02.548: E/AndroidRuntime(20393): FATAL EXCEPTION: AsyncTask #1
10-06 17:35:02.548: E/AndroidRuntime(20393): java.lang.RuntimeException: An error occured while executing doInBackground()
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.lang.Thread.run(Thread.java:1019)
10-06 17:35:02.548: E/AndroidRuntime(20393): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.os.Handler.<init>(Handler.java:121)
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.app.Dialog.<init>(Dialog.java:101)
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.app.AlertDialog.<init>(AlertDialog.java:63)
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.app.AlertDialog.<init>(AlertDialog.java:59)
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.app.AlertDialog$Builder.create(AlertDialog.java:786)
10-06 17:35:02.548: E/AndroidRuntime(20393): at com.MariTimeGlobalNews.NewsScreenActivity.getData(NewsScreenActivity.java:450)
10-06 17:35:02.548: E/AndroidRuntime(20393): at com.MariTimeGlobalNews.NewsScreenActivity$AllDataAsyn.doInBackground(NewsScreenActivity.java:138)
10-06 17:35:02.548: E/AndroidRuntime(20393): at com.MariTimeGlobalNews.NewsScreenActivity$AllDataAsyn.doInBackground(NewsScreenActivity.java:1)
10-06 17:35:02.548: E/AndroidRuntime(20393): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-06 17:35:02.548: E/AndroidRuntime(20393): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
10-06 17:35:02.548: E/AndroidRuntime(20393): ... 4 more
答案 0 :(得分：1)
试试这个。
runOnUiThread(new Runnable()
{
public void run()
{
// Your Alert Code
}
});
答案 1 :(得分：0)
在onCreate方法中使用以下代码：
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);