這是我的問題,我想從ListView中設置文本。問題是,我會得到一個錯誤,因爲(根據我的日誌)我主要活動的setContentView與TextView不匹配,我想從另一個.xml(contactList.xml)設置文本。ListView中的Android setText導致空指針
Jobs Activity(Main在我ParseJobs方法)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jobs);
vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
TextView assigned = (TextView) findViewById(R.id.assigned);
new ParseJobs().execute();
ParseJobs()方法
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (ACKNOWLEDGED.contains("False")) {
/** Updating parsed JSON data into ListView */
ListAdapter adapter = new SimpleAdapter(Jobs.this, contactList, R.layout.list_item, new String[] { job, pays, ready_at }, new int[] { R.id.job1, R.id.pays1, R.id.ready_at1 });
setListAdapter(adapter);
//TextView readyORdue = (TextView) findViewById(R.id.readyORdue);
//readyORdue.setText("Ready At:");
}
if (ACKNOWLEDGED.contains("True")) {
/** Updating parsed JSON data into ListView */
ListAdapter adapter = new SimpleAdapter(Jobs.this, contactList, R.layout.list_item, new String[] { job, pays, due_by }, new int[] { R.id.job1, R.id.pays1, R.id.due_by1 });
setListAdapter(adapter);
//TextView readyORdue = (TextView) findViewById(R.id.readyORdue);
//readyORdue.setText("Due By:");
}
VerifyDriver.dismiss();
}
}
注意,我試圖更新的TextView 「readyORdue」,而是因爲,這TextView的屬於SimpleAdapter contactList我會得到一個錯誤.xml
所以我的問題是,我將如何從我的contactList XML佈局setText textview?
我的繼承人日誌:
07-17 15:55:16.703: W/dalvikvm(4387): threadid=1: thread exiting with uncaught exception (group=0x40015578)
07-17 15:55:16.703: E/AndroidRuntime(4387): FATAL EXCEPTION: main
07-17 15:55:16.703: E/AndroidRuntime(4387): java.lang.NullPointerException
07-17 15:55:16.703: E/AndroidRuntime(4387): at com.jetdelivery.mobile.Jobs$ParseJobs.onPostExecute(Jobs.java:287)
07-17 15:55:16.703: E/AndroidRuntime(4387): at com.jetdelivery.mobile.Jobs$ParseJobs.onPostExecute(Jobs.java:1)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.os.AsyncTask.finish(AsyncTask.java:417)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.os.AsyncTask.access$300(AsyncTask.java:127)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.os.Handler.dispatchMessage(Handler.java:99)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.os.Looper.loop(Looper.java:130)
07-17 15:55:16.703: E/AndroidRuntime(4387): at android.app.ActivityThread.main(ActivityThread.java:3687)
07-17 15:55:16.703: E/AndroidRuntime(4387): at java.lang.reflect.Method.invokeNative(Native Method)
07-17 15:55:16.703: E/AndroidRuntime(4387): at java.lang.reflect.Method.invoke(Method.java:507)
07-17 15:55:16.703: E/AndroidRuntime(4387): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
07-17 15:55:16.703: E/AndroidRuntime(4387): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
07-17 15:55:16.703: E/AndroidRuntime(4387): at dalvik.system.NativeStart.main(Native Method)
287線是 「readyORdue.setText(」 準備好: 「);」
你能發佈具有確切錯誤的LogCat嗎? R.id.readyORdue - layout xml也有幫助 – Maxim 2012-07-17 22:54:05
我可以問一個問題嗎?你爲什麼試圖在onPostExecute中設置一個適配器,並在與你的UI線程不同的線程中創建一個適配器。認爲它可能真的解決了! – Ahmed 2012-07-17 22:56:07
剛剛更新我的日誌 – 2012-07-17 22:56:43