我试图在向数据库表中添加一行时显示一个进度对话框，但问题是进度对话框只显示 1 秒，之后应用程序崩溃，有人可以帮我吗？
public void onClick(View arg0) {
// TODO Auto-generated method stub
ConnectivityManager cm =(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting())
{
final EditText wholepost=(EditText)findViewById(R.id.wholepost);
final String post_type=spinner.getSelectedItem().toString();
final String post_type2=post_type.replace(" ", "%20");
final String post1=wholepost.getText().toString();
String post2=post1.replace(" ", "%20");
final String post3=post2.replace("\n","%0D");
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
final String now = df.format(new Date());
if(post1.equals(null))
{
Toast.makeText(getBaseContext(), "Please write a post before clicking on the button",Toast.LENGTH_LONG).show();
}
else
{
if(post1.length()<15)
{
Toast.makeText(getBaseContext(), "Post is too small",Toast.LENGTH_LONG).show();
}
else
{
if(post1.length()>500)
{Toast.makeText(getBaseContext(), "Post should be smaller",Toast.LENGTH_LONG).show();}
else
{
pd.show();
Thread th=new Thread(new Runnable() {
public void run() {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://192.168.1.38/test/Addpost.php?username="+username+"&fname="+firstname+"&lname="+lastname+"&dop="+now+"&content="+post3+"&type="+post_type2+"");
try
{
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("FirstN",firstname));
nameValuePairs.add(new BasicNameValuePair("LastN",lastname));
nameValuePairs.add(new BasicNameValuePair("Content",post1));
nameValuePairs.add(new BasicNameValuePair("type",post_type));
nameValuePairs.add(new BasicNameValuePair("Dateofp",now));
nameValuePairs.add(new BasicNameValuePair("username",username));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
response = httpclient.execute(httppost);
if(response.getStatusLine().getStatusCode()==200)
{
entity=response.getEntity();
if(entity !=null)
{
Toast.makeText(getBaseContext(),"POST SUCCESFULLY ADDED",Toast.LENGTH_LONG).show();
}
}
else
{
Toast.makeText(getBaseContext(),"ERROR RERTY OR CHECK YOUR CONNECTION",Toast.LENGTH_LONG).show();
}
wholepost.setText("");
}
catch(Exception ex)
{Toast.makeText(getBaseContext(),"CONNECTION ERROR",Toast.LENGTH_LONG).show();}
pd.dismiss();
}
});
th.start();
}}
}
}
else
{
Toast.makeText(getBaseContext(),"Please make sure you're connected to the internet",Toast.LENGTH_LONG).show();
}
}
});