我正在使用教程中的以下代码： http://geekonjava.blogspot.in/2014/03/upload-image-on-server-in-android-using.html
每当我运行代码时，它会在log cat上显示以下错误，并在单击Upload Button时强制关闭应用程序。任何人都可以帮我吗？
03-30 09:00:35.026: E/Trace(1086): error opening trace file: No such file or directory (2)
03-30 09:00:35.238: D/libEGL(1086): loaded /system/lib/egl/libEGL_emulation.so
03-30 09:00:35.242: D/(1086): HostConnection::get() New Host Connection established 0xb85a7800, tid 1086
03-30 09:00:35.646: D/libEGL(1086): loaded /system/lib/egl/libGLESv1_CM_emulation.so
03-30 09:00:35.650: D/libEGL(1086): loaded /system/lib/egl/libGLESv2_emulation.so
03-30 09:00:37.062: W/EGL_emulation(1086): eglSurfaceAttrib not implemented
03-30 09:00:37.106: D/OpenGLRenderer(1086): Enabling debug mode 0
03-30 09:00:37.158: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8550e18): name, size, mSize = 1, 1048576, 1048576
03-30 09:00:38.226: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8562e40): name, size, mSize = 2, 2304, 1050880
03-30 09:00:38.386: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb85555a0): name, size, mSize = 4, 9216, 1060096
03-30 09:00:38.398: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb858bd48): name, size, mSize = 5, 3328, 1063424
03-30 09:00:38.486: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8539dd0): name, size, mSize = 7, 1024, 1064448
03-30 09:00:43.450: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8577238): name, size, mSize = 9, 3328, 1067776
03-30 09:00:43.898: W/dalvikvm(1086): threadid=10: thread exiting with uncaught exception (group=0xa62e3288)
03-30 09:00:43.898: E/AndroidRuntime(1086): FATAL EXCEPTION: Thread-95
03-30 09:00:43.898: E/AndroidRuntime(1086): java.lang.NullPointerException
03-30 09:00:43.898: E/AndroidRuntime(1086): at java.io.File.fixSlashes(File.java:185)
03-30 09:00:43.898: E/AndroidRuntime(1086): at java.io.File.<init>(File.java:134)
03-30 09:00:43.898: E/AndroidRuntime(1086): at com.sunil.upload.MainActivity.uploadFile(MainActivity.java:115)
03-30 09:00:43.898: E/AndroidRuntime(1086): at com.sunil.upload.MainActivity$1.run(MainActivity.java:72)
03-30 09:00:43.898: E/AndroidRuntime(1086): at java.lang.Thread.run(Thread.java:856)
03-30 09:00:44.050: W/EGL_emulation(1086): eglSurfaceAttrib not implemented
03-30 09:00:44.230: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8558c50): name, size, mSize = 12, 15360, 1083136
03-30 09:00:44.242: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8551420): name, size, mSize = 13, 9216, 1092352
03-30 09:00:44.294: D/OpenGLRenderer(1086): TextureCache::get: create texture(0xb8551880): name, size, mSize = 14, 9216, 1101568
03-30 09:00:45.598: D/OpenGLRenderer(1086): TextureCache::flush: target size: 660940
03-30 09:00:45.598: D/OpenGLRenderer(1086): TextureCache::callback: name, removed size, mSize = 9, 3328, 1098240
03-30 09:00:45.598: D/OpenGLRenderer(1086): TextureCache::callback: name, removed size, mSize = 1, 1048576, 49664
03-30 09:00:45.634: E/WindowManager(1086): Activity com.sunil.upload.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@53473594 that was originally added here
03-30 09:00:45.634: E/WindowManager(1086): android.view.WindowLeaked: Activity com.sunil.upload.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@53473594 that was originally added here
03-30 09:00:45.634: E/WindowManager(1086): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.Window$LocalWindowManager.addView(Window.java:547)
03-30 09:00:45.634: E/WindowManager(1086): at android.app.Dialog.show(Dialog.java:277)
03-30 09:00:45.634: E/WindowManager(1086): at android.app.ProgressDialog.show(ProgressDialog.java:116)
03-30 09:00:45.634: E/WindowManager(1086): at android.app.ProgressDialog.show(ProgressDialog.java:99)
03-30 09:00:45.634: E/WindowManager(1086): at com.sunil.upload.MainActivity.onClick(MainActivity.java:67)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.View.performClick(View.java:4084)
03-30 09:00:45.634: E/WindowManager(1086): at android.view.View$PerformClick.run(View.java:16966)
03-30 09:00:45.634: E/WindowManager(1086): at android.os.Handler.handleCallback(Handler.java:615)
03-30 09:00:45.634: E/WindowManager(1086): at android.os.Handler.dispatchMessage(Handler.java:92)
03-30 09:00:45.634: E/WindowManager(1086): at android.os.Looper.loop(Looper.java:137)
03-30 09:00:45.634: E/WindowManager(1086): at android.app.ActivityThread.main(ActivityThread.java:4745)
03-30 09:00:45.634: E/WindowManager(1086): at java.lang.reflect.Method.invokeNative(Native Method)
03-30 09:00:45.634: E/WindowManager(1086): at java.lang.reflect.Method.invoke(Method.java:511)
03-30 09:00:45.634: E/WindowManager(1086): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-30 09:00:45.634: E/WindowManager(1086): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-30 09:00:45.634: E/WindowManager(1086): at dalvik.system.NativeStart.main(Native Method)
03-30 09:00:45.906: I/Process(1086): Sending signal. PID: 1086 SIG: 9
代码：
public class MainActivity extends Activity implements OnClickListener{
private TextView messageText;
private Button uploadButton, btnselectpic;
private ImageView imageview;
private int serverResponseCode = 0;
private ProgressDialog dialog = null;
private String upLoadServerUri = null;
private String imagepath=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
uploadButton = (Button)findViewById(R.id.uploadButton);
btnselectpic = (Button)findViewById(R.id.button_selectpic);
messageText = (TextView)findViewById(R.id.messageText);
imageview = (ImageView)findViewById(R.id.imageView_pic);
btnselectpic.setOnClickListener(this);
uploadButton.setOnClickListener(this);
upLoadServerUri = "http://localhost/UploadFile.php";
ImageView img= new ImageView(this);
}
@Override
public void onClick(View arg0) {
if(arg0==btnselectpic)
{
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1);
}
else if (arg0==uploadButton) {
dialog = ProgressDialog.show(MainActivity.this, "", "Uploading file...", true);
messageText.setText("uploading started.....");
new Thread(new Runnable() {
public void run() {
uploadFile(imagepath);
}
}).start();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
//Bitmap photo = (Bitmap) data.getData().getPath();
Uri selectedImageUri = data.getData();
imagepath = getPath(selectedImageUri);
Bitmap bitmap=BitmapFactory.decodeFile(imagepath);
imageview.setImageBitmap(bitmap);
messageText.setText("Uploading file path:" +imagepath);
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
public int uploadFile(String sourceFileUri) {
String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist :"+imagepath);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"+ imagepath);
}
});
return 0;
}
else
{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
+ fileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
+" F:/wamp/wamp/www/uploads";
messageText.setText(msg);
Toast.makeText(MainActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Got Exception : see logcat ");
Toast.makeText(MainActivity.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} // End else block
}
}
UploadFile.php：
<?php
$file_path = "uploads/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>
答案 0 :(得分：0)
检查您的日志：您排队NullPonterException：
File sourceFile = new File(sourceFileUri); // your sourceFileUri = null here,
因为您使用null agrument调用uploadFile()。