因此，当我点击图片并发送切换活动的意图时，我的应用程序崩溃了。 如果有人想看，HERE就是项目。
//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)v.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;
}
}
}
Activity2.java：
//Activity2.java
package com.example.sqllite;
import com.example.kontaktysqllite.R;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;
public class Activity2 extends Activity
{
private WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.layout2);
}
}
和logcat
09-05 13:12:56.915: D/AbsListView(16209): unregisterIRListener() is called
09-05 13:13:16.354: D/AndroidRuntime(16209): Shutting down VM
09-05 13:13:16.354: W/dalvikvm(16209): threadid=1: thread exiting with uncaught exception (group=0x418e7da0)
09-05 13:13:16.364: E/AndroidRuntime(16209): FATAL EXCEPTION: main
09-05 13:13:16.364: E/AndroidRuntime(16209): Process: com.example.kontaktysqllite, PID: 16209
09-05 13:13:16.364: E/AndroidRuntime(16209): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.kontaktysqllite/com.example.sqllite.Activity2}; have you declared this activity in your AndroidManifest.xml?
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1648)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1442)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Activity.startActivityForResult(Activity.java:3511)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Activity.startActivityForResult(Activity.java:3472)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Activity.startActivity(Activity.java:3714)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.Activity.startActivity(Activity.java:3682)
09-05 13:13:16.364: E/AndroidRuntime(16209): at com.example.sqllite.MainActivity$OrderAdapter$1.onClick(MainActivity.java:115)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.view.View.performClick(View.java:4633)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.view.View$PerformClick.run(View.java:19330)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.os.Handler.handleCallback(Handler.java:733)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.os.Handler.dispatchMessage(Handler.java:95)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.os.Looper.loop(Looper.java:157)
09-05 13:13:16.364: E/AndroidRuntime(16209): at android.app.ActivityThread.main(ActivityThread.java:5356)
09-05 13:13:16.364: E/AndroidRuntime(16209): at java.lang.reflect.Method.invokeNative(Native Method)
09-05 13:13:16.364: E/AndroidRuntime(16209): at java.lang.reflect.Method.invoke(Method.java:515)
09-05 13:13:16.364: E/AndroidRuntime(16209): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
09-05 13:13:16.364: E/AndroidRuntime(16209): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
09-05 13:13:16.364: E/AndroidRuntime(16209): at dalvik.system.NativeStart.main(Native Method)
我无法真正阅读logcat，因此找到崩溃背后的原因真的很难。 可能是什么问题？
答案 0 :(得分：3)
AndroidManifest.xml中的更改
<activity
android:name="Activity2"
android:label="@string/app_name">
</activity>
进入这个
<activity
android:name="com.example.sqllite.Activity2"
android:label="@string/app_name">
</activity>
答案 1 :(得分：1)
您必须在AndroidManifest.xml中将包名称放在布局名称之前 像这样：
<activity
android:name="com.example.sqllite.Activity2"
android:label="@string/app_name">
</activity>
或将Dot放在布局名称之前 像这样：
<activity
android:name=".Activity2"
android:label="@string/app_name">
</activity>