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내 응용 프로그램에서 MUPDF reader를 사용하여 렌더링하는 중입니다. 렌더링 중에 nullpointer 오류가 발생합니다. 코드를 완전히 첨부했습니다 .SD 카드에 pdf가 있고 sdcard가 마운트 가능한지 확인되었습니다.mupdf를 사용하여 pdf를 렌더링하는 동안 오류가 발생했습니다.
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ebookr"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name="com.artifex.mupdfdemo.MuPDFActivity"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="application/vnd.ms-xpsdocument"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="application/pdf"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="application/x-cbz"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="file"/>
<data android:mimeType="*/*"/>
<data android:pathPattern=".*\\.xps"/>
<data android:host="*"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="file"/>
<data android:mimeType="*/*"/>
<data android:pathPattern=".*\\.pdf"/>
<data android:host="*"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="file"/>
<data android:mimeType="*/*"/>
<data android:pathPattern=".*\\.cbz"/>
<data android:host="*"/>
</intent-filter>
</activity>
<activity android:name="OutlineActivity"
android:label="@string/outline_title">
</activity>
<activity
android:name="com.example.ebookr.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
에게
package com.example.ebookr;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.res.AssetManager;
import android.util.Log;
import android.view.Menu;
import com.artifex.mupdfdemo.*;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CopyAssetsbrochure();
try
{
//Uri uri = Uri.parse("/sdcard/divya.pdf");
String path = "/sdcard/divya.pdf";
MuPDFActivity pdf = new MuPDFActivity();
try {
pdf.openFileInput(path);
}
catch(Exception e)
{
Log.e("in code",e.getMessage());
}
/*Intent intent = new Intent(getBaseContext(), MuPDFActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
getBaseContext().startActivity(intent); */
}
catch (Exception e) {
// TODO Auto-generated catch block
StackTraceElement[] stack = e.getStackTrace();
String StringTrace = "";
String Trace = null;
for(StackTraceElement line : stack)
{
Trace += line.toString();
}
Log.e("Soap",Trace);
String err = (e.getMessage()==null)?"SD Card failed":e.getMessage();
Log.e("sdcard-err2:",err);
e.getCause();
}
}
private void CopyAssetsbrochure() {
AssetManager assetManager = getAssets();
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
Log.d("Test", "sdcard mounted and writable");
}
else
{
Log.d("Test", "sdcard state: " + state);
}
String[] files = null;
try
{
files = assetManager.list("");
}
catch (IOException e)
{
Log.e("tag", e.getMessage());
}
for(int i=0; i<files.length; i++)
{
String fStr = files[i];
if(fStr.equalsIgnoreCase("divya.pdf"))
{
InputStream in = null;
OutputStream out = null;
try
{
in = assetManager.open(files[i]);
out = new FileOutputStream("/sdcard/" + files[i]);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
break;
}
catch(Exception e)
{
Log.e("CopyAssests", e.getMessage());
}
}
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
로그 캣 :
07-07 11:22:49.689: W/Trace(2085): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:21.929: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:21.929: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:21.939: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:22.310: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:22.365: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:23.279: D/Test(2189): sdcard mounted and writable
07-07 11:23:24.631: E/Soap(2189): nullandroid.util.Log.println_native(Native Method)android.util.Log.e(Log.java:231)com.example.ebookr.MainActivity.onCreate(MainActivity.java:40)android.app.Activity.performCreate(Activity.java:5104)android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)android.app.ActivityThread.access$600(ActivityThread.java:141)android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)android.os.Handler.dispatchMessage(Handler.java:99)android.os.Looper.loop(Looper.java:137)android.app.ActivityThread.main(ActivityThread.java:5039)java.lang.reflect.Method.invokeNative(Native Method)java.lang.reflect.Method.invoke(Method.java:511)com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)dalvik.system.NativeStart.main(Native Method)
07-07 11:23:24.631: E/sdcard-err2:(2189): println needs a message
07-07 11:23:24.769: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:24.790: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:24.861: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:24.909: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.099: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.109: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.139: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.209: I/Choreographer(2189): Skipped 31 frames! The application may be doing too much work on its main thread.
07-07 11:23:25.249: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.249: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.269: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.269: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.279: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.279: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.299: D/gralloc_goldfish(2189): Emulator without GPU emulation detected.
07-07 11:23:25.409: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0
07-07 11:23:25.469: W/Trace(2189): Unexpected value from nativeGetEnabledTags: 0