所以我有这个问题，我认为代码应该可行，但它没有。它在应用程序启动时崩溃了。 Logcat似乎没有帮助，所以如何检测崩溃我的应用程序？ 如果有人想检查错误或其他什么，这是我的应用程序的代码 http://www23.zippyshare.com/v/472319/file.html
这是MainActivity.java
package com.example.sqllite;
import java.util.ArrayList;
import com.example.kontaktysqllite.R;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends ListActivity{
private ProgressDialog m_ProgressDialog = null;
private ArrayList<Order> m_orders = null;
private OrderAdapter m_adapter;
private Runnable viewOrders;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
m_orders = new ArrayList<Order>();
this.m_adapter = new OrderAdapter(this, R.layout.row, m_orders);
setListAdapter(this.m_adapter);
viewOrders = new Runnable(){
@Override
public void run() {
getOrders();
}
};
Thread thread = new Thread(null, viewOrders, "MagentoBackground");
thread.start();
m_ProgressDialog = ProgressDialog.show(MainActivity.this,
"Please wait...", "Retrieving data ...", true);
}
private Runnable returnRes = new Runnable() {
@Override
public void run() {
if(m_orders != null && m_orders.size() > 0){
m_adapter.notifyDataSetChanged();
for(int i=0;i<m_orders.size();i++)
m_adapter.add(m_orders.get(i));
}
m_ProgressDialog.dismiss();
m_adapter.notifyDataSetChanged();
}
};
private void getOrders(){
try{
final ZarzadcaBazy zb = new ZarzadcaBazy(this);
m_orders = new ArrayList<Order>();
Cursor k = zb.dajWszystkie();
while (k.moveToNext()) {
String message = k.getString(1);
Order order = new Order();
order.setOrderLink(message);
order.setOrderName("szablon");
m_orders.add(order);
Log.i("ARRAY", ""+ m_orders.size());
}
} catch (Exception e) {
Log.e("BACKGROUND_PROC", e.getMessage());
}
runOnUiThread(returnRes);
}
private class OrderAdapter extends ArrayAdapter<Order> {
private ArrayList<Order> items;
public OrderAdapter(Context context, int textViewResourceId, ArrayList<Order> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View v = convertView;
if (v == null)
{
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
Order o = items.get(position);
if (o != null)
{
TextView name = (TextView) v.findViewById(R.id.row_textView);
ImageView img = (ImageView)findViewById(R.id.row_imageview);
if (name != null)
{
name.setText("Name: "+o.getOrderName());
}
img.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
Intent intent = new Intent(MainActivity.this, Activity2.class);
intent.putExtra("urlString", "https://beta2.createer.com/Action/Show/777203e8-5b53-462d-863b-c4e10a3abd5b/");
startActivity(intent);
}
});
}
return v;
}
}
}
logcat的：
09-04 14:56:37.244: I/Process(579): Sending signal. PID: 579 SIG: 9
09-04 14:56:37.374: W/ApplicationPackageManager(868): getCSCPackageItemText()
09-04 14:56:37.424: D/AbsListView(868): Get MotionRecognitionManager
09-04 14:56:37.444: D/AbsListView(868): onVisibilityChanged() is called, visibility : 8
09-04 14:56:37.444: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.464: I/ARRAY(868): 1
09-04 14:56:37.464: I/ARRAY(868): 2
09-04 14:56:37.464: I/ARRAY(868): 3
09-04 14:56:37.494: D/AbsListView(868): onVisibilityChanged() is called, visibility : 4
09-04 14:56:37.494: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.494: D/AbsListView(868): onVisibilityChanged() is called, visibility : 0
09-04 14:56:37.494: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.494: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.504: D/AbsListView(868): onVisibilityChanged() is called, visibility : 0
09-04 14:56:37.504: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.504: E/ViewRootImpl(868): sendUserActionEvent() mView == null
09-04 14:56:37.504: D/AbsListView(868): unregisterIRListener() is called
09-04 14:56:37.524: I/Adreno-EGL(868): <qeglDrvAPI_eglInitialize:381>: EGL 1.4 QUALCOMM build: (CL3869936)
09-04 14:56:37.524: I/Adreno-EGL(868): OpenGL ES Shader Compiler Version: 17.01.11.SPL
09-04 14:56:37.524: I/Adreno-EGL(868): Build Date: 01/17/14 Fri
09-04 14:56:37.524: I/Adreno-EGL(868): Local Branch:
09-04 14:56:37.524: I/Adreno-EGL(868): Remote Branch:
09-04 14:56:37.524: I/Adreno-EGL(868): Local Patches:
09-04 14:56:37.524: I/Adreno-EGL(868): Reconstruct Branch:
09-04 14:56:37.574: D/OpenGLRenderer(868): Enabling debug mode 0
09-04 14:56:37.715: D/dalvikvm(868): GC_FOR_ALLOC freed 204K, 34% free 17536K/26476K, paused 16ms, total 16ms
09-04 14:56:37.745: I/dalvikvm-heap(868): Grow heap (frag case) to 39.227MB for 18924856-byte allocation
09-04 14:56:37.745: W/SQLiteConnectionPool(868): A SQLiteConnection object for database '+data+data+com_example_kontaktysqllite+databases+kontakty_db' was leaked! Please fix your application to end transactions in progress properly and to close the database when it is no longer needed.
09-04 14:56:37.785: D/AndroidRuntime(868): Shutting down VM
09-04 14:56:37.785: W/dalvikvm(868): threadid=1: thread exiting with uncaught exception (group=0x418e7da0)
09-04 14:56:37.805: E/AndroidRuntime(868): FATAL EXCEPTION: main
09-04 14:56:37.805: E/AndroidRuntime(868): Process: com.example.kontaktysqllite, PID: 868
09-04 14:56:37.805: E/AndroidRuntime(868): java.lang.NullPointerException
09-04 14:56:37.805: E/AndroidRuntime(868): at com.example.sqllite.MainActivity$OrderAdapter.getView(MainActivity.java:109)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.AbsListView.obtainView(AbsListView.java:2715)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.ListView.makeAndAddView(ListView.java:1801)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.ListView.fillDown(ListView.java:697)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.ListView.fillFromTop(ListView.java:763)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.ListView.layoutChildren(ListView.java:1627)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.AbsListView.onLayout(AbsListView.java:2528)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.View.layout(View.java:15655)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewGroup.layout(ViewGroup.java:4856)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.View.layout(View.java:15655)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewGroup.layout(ViewGroup.java:4856)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.View.layout(View.java:15655)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewGroup.layout(ViewGroup.java:4856)
09-04 14:56:37.805: E/AndroidRuntime(868): at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:438)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.View.layout(View.java:15655)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewGroup.layout(ViewGroup.java:4856)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.View.layout(View.java:15655)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewGroup.layout(ViewGroup.java:4856)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2283)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2003)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1235)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6470)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.Choreographer.doCallbacks(Choreographer.java:603)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.Choreographer.doFrame(Choreographer.java:573)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.os.Handler.handleCallback(Handler.java:733)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.os.Handler.dispatchMessage(Handler.java:95)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.os.Looper.loop(Looper.java:157)
09-04 14:56:37.805: E/AndroidRuntime(868): at android.app.ActivityThread.main(ActivityThread.java:5356)
09-04 14:56:37.805: E/AndroidRuntime(868): at java.lang.reflect.Method.invokeNative(Native Method)
09-04 14:56:37.805: E/AndroidRuntime(868): at java.lang.reflect.Method.invoke(Method.java:515)
09-04 14:56:37.805: E/AndroidRuntime(868): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
09-04 14:56:37.805: E/AndroidRuntime(868): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
09-04 14:56:37.805: E/AndroidRuntime(868): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
您将获得NullPointerException
ImageView img = (ImageView)findViewById(R.id.row_imageview);
请使用
ImageView img = (ImageView)v.findViewById(R.id.row_imageview);
img与v相同，在TextView name视图中。
希望这有帮助。