我正在创建一个应用程序来查看 pdf 文件。我在我的应用程序的主页上使用了 pdfviewer.jar,它会显示我存储在内部存储中的 pdf 文件,但是当我单击该项目时,应用程序崩溃了。
在我的 MainActivity.java
package com.example.pdf;
import java.io.File;
import java.io.FilenameFilter;
import net.sf.andpdf.pdfviewer.PdfViewerActivity;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class MainActivity extends ListActivity {
String[] pdflist;
File[] imagelist;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
File images = Environment.getExternalStorageDirectory();
imagelist = images.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return ((name.endsWith(".pdf")));
}
});
pdflist = new String[imagelist.length];
for (int i = 0; i < imagelist.length; i++) {
pdflist[i] = imagelist[i].getName();
}
this.setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, pdflist));
}
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String path = imagelist[(int) id].getAbsolutePath();
openPdfIntent(path);
}
private void openPdfIntent(String path) {
try {
final Intent intent = new Intent(MainActivity.this,DefaultActivity.class);
intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
}
在我的 DefaultActivity.java
package com.example.pdf;
import android.os.Bundle;
import net.sf.andpdf.pdfviewer.PdfViewerActivity;
public class DefaultActivity extends PdfViewerActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
public int getPreviousPageImageResource() {
return R.drawable.left_arrow;
}
public int getNextPageImageResource() {
return R.drawable.right_arrow;
}
public int getZoomInImageResource() {
return R.drawable.zoom_in;
}
public int getZoomOutImageResource() {
return R.drawable.zoom_out;
}
public int getPdfPasswordLayoutResource() {
return R.layout.pdf_file_password;
}
public int getPdfPageNumberResource() {
return R.layout.dialog_pagenumber;
}
public int getPdfPasswordEditField() {
return R.id.etPassword;
}
public int getPdfPasswordOkButton() {
return R.id.btOK;
}
public int getPdfPasswordExitButton() {
return R.id.btExit;
}
public int getPdfPageNumberEditField() {
return R.id.pagenum_edit;
}
}
这是我的日志猫输出
10-31 12:57:30.580: E/AndroidRuntime(1163): FATAL EXCEPTION: main
10-31 12:57:30.580: E/AndroidRuntime(1163): java.lang.NoClassDefFoundError: com.example.pdf.DefaultActivity
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.example.pdf.MainActivity.openPdfIntent(MainActivity.java:50)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.example.pdf.MainActivity.onListItemClick(MainActivity.java:45)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.app.ListActivity$2.onItemClick(ListActivity.java:319)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.widget.AdapterView.performItemClick(AdapterView.java:292)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.widget.AbsListView.performItemClick(AbsListView.java:1058)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2514)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.widget.AbsListView.onTouchEvent(AbsListView.java:3180)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.View.dispatchTouchEvent(View.java:5541)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1951)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1712)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1912)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1371)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1860)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.View.dispatchPointerEvent(View.java:5721)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2890)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2466)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:845)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:859)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.os.Handler.dispatchMessage(Handler.java:99)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.os.Looper.loop(Looper.java:137)
10-31 12:57:30.580: E/AndroidRuntime(1163): at android.app.ActivityThread.main(ActivityThread.java:4446)
10-31 12:57:30.580: E/AndroidRuntime(1163): at java.lang.reflect.Method.invokeNative(Native Method)
10-31 12:57:30.580: E/AndroidRuntime(1163): at java.lang.reflect.Method.invoke(Method.java:511)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-31 12:57:30.580: E/AndroidRuntime(1163): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-31 12:57:30.580: E/AndroidRuntime(1163): at dalvik.system.NativeStart.main(Native Method)
我检查了我是否在清单文件中声明了所有活动。