0
在我的應用程序的用戶界面中有四個按鈕，其中三個按鈕（當單擊時）從mysql db中檢索圖像並將其顯示在android手機中。第四個按鈕的工作是從數據庫中檢索文本。如何防止我的android應用程序強制關閉？
如果有任何檢索圖像的按鈕先被點擊，圖像將被顯示。然後如果點擊檢索圖像的按鈕，則會顯示文本。
但是，當點擊顯示圖像的任何按鈕之前首先單擊檢索文本的按鈕時，應用程序強制關閉！
檢索文本如下
b.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Toast.LENGTH_SHORT).show();
try {
data.put("id",id);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String url="http://10.0.2.2:8080/finder/review/listA";
try {
img.setImageBitmap(null);
json =HTTPPoster.doPost(url, data);
Toast.makeText(getBaseContext(),json.toString(), Toast.LENGTH_SHORT).show();
titles=json.getJSONObject("titles");
Toast.makeText(getBaseContext(), titles.toString(), Toast.LENGTH_SHORT).show();
msgs=json.getJSONObject("msgs");
names=json.getJSONObject("names");
String one=titles.getString("0");
Toast.makeText(getBaseContext(), one.toString(),Toast.LENGTH_LONG).show();
t.setText("\nReviews \n");
String content="";
for(int i=0;i<3;i++)
{
String msg=msgs.getString(i+"");
name=names.getString(i+"");
String title=titles.getString(i+"");
content=t.getText()+("\n Name"+name+"\n Title: "+title+"\n Msg:"+msg);
t.setText(content);
Toast.makeText(getBaseContext(),"Name:"+name+"\n Title: "+title+"\n Message"+msg,Toast.LENGTH_SHORT).show();
}
// t.setText()
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
logcat的
06-07 00:25:29.923: INFO/Process(234): Sending signal. PID: 234 SIG: 9
06-07 00:25:30.042: INFO/WindowManager(58): WIN DEATH: Window{44e66ef0 com.lpss/com.lpss.MyList paused=false}
06-07 00:25:30.053: INFO/WindowManager(58): WIN DEATH: Window{44d72da0 com.lpss/com.lpss.lpss paused=false}
06-07 00:25:30.053: INFO/ActivityManager(58): Process com.lpss (pid 234) has died.
06-07 00:25:30.062: WARN/GpsLocationProvider(58): Unneeded remove listener for uid 1000
06-07 00:25:30.062: DEBUG/GpsLocationProvider(58): stopNavigating
06-07 00:25:30.062: INFO/WindowManager(58): WIN DEATH: Window{44dedb10 Toast paused=false}
06-07 00:25:30.091: WARN/ActivityManager(58): Scheduling restart of crashed service com.lpss/.NotifyService in 5000ms
06-07 00:25:30.103: INFO/WindowManager(58): WIN DEATH: Window{44dd9490 com.lpss/com.lpss.Contents paused=false}
06-07 00:25:30.244: INFO/ActivityManager(58): Start proc com.lpss for activity com.lpss/.MyList: pid=248 uid=10030 gids={3003, 1015}
06-07 00:25:30.244: ERROR/ActivityThread(58): Failed to find provider info for android.server.checkin
06-07 00:25:30.244: WARN/Checkin(58): Can't log event SYSTEM_SERVICE_LOOPING: java.lang.IllegalArgumentException: Unknown URL content://android.server.checkin/events
06-07 00:25:30.743: DEBUG/ddm-heap(248): Got feature list request
06-07 00:25:30.912: INFO/UsageStats(58): Unexpected resume of com.lpss while already resumed in com.lpss
06-07 00:25:31.443: WARN/InputManagerService(58): Got RemoteException sending setActive(false) notification to pid 234 uid 10030
06-07 00:25:31.603: INFO/ActivityManager(58): Displayed activity com.lpss/.MyList: 1487 ms (total 1487 ms)
06-07 00:25:31.713: WARN/NotificationService(58): Object died trying to hide notification [email protected] in package com.lpss
06-07 00:25:31.713: WARN/ActivityManager(58): setProcessForeground called on unknown pid: 234
06-07 00:25:31.723: WARN/NotificationService(58): Object died trying to show notification [email protected] in package com.lpss
06-07 00:25:31.723: WARN/ActivityManager(58): setProcessForeground called on unknown pid: 234
06-07 00:25:31.723: WARN/NotificationService(58): Object died trying to show notification [email protected] in package com.lpss
06-07 00:25:31.723: WARN/ActivityManager(58): setProcessForeground called on unknown pid: 234
06-07 00:25:31.723: WARN/NotificationService(58): Object died trying to show notification [email protected] in package com.lpss
06-07 00:25:31.723: WARN/ActivityManager(58): setProcessForeground called on unknown pid: 234
06-07 00:41:25.262: DEBUG/dalvikvm(58): GC freed 19490 objects/957584 bytes in 209ms
代碼檢索圖像
b3.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
try {
data.put("name",name);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String url="http://10.0.2.2:8080/finder/place/ph?id="+id;
// json =HTTPPoster.doPost(url, data);
downloadImage(url);
// Toast.makeText(this,json.toString() , Toast.LENGTH_SHORT).show();
}
});
b4.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
t.setText("");
try {
data.put("name",name);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String url="http://10.0.2.2:8080/finder/place/map?id="+id;
// json =HTTPPoster.doPost(url, data);
downloadImage(url);
// Toast.makeText(this,json.toString() , Toast.LENGTH_SHORT).show();
}
});
你可以請發佈stacktrace？ – BigFwoosh 2011-06-06 19:04:28
就像BigFwosh說的那樣，我們需要一個堆棧軌跡來了解從哪裏開始。這可能是因爲它無法從你的數據庫中讀取，可能是因爲任何原因你的方法中的任何對象都是空的。 – CaseyB 2011-06-06 19:15:03
logcat中有很多條目..我怎麼知道要發佈哪一個？ – Shalini 2011-06-06 19:29:21