我们有这个活动代码......但是我们需要在片段
中实现它我们已尝试但Uri selectedImageUri = data.getData();
代码行中的应用程序崩溃
plzz帮助我!!!!
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://10.0.2.2/newapp/UploadToServer.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 = getContentResolver().query(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 = "ReplacedwithUserid.jpg";
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); //replaced with fileName
//conn.setRequestProperty(field, newValue);
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"
+" C:/wamp/www/newapp/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
}
}
logcat的:
08-08 01:50:22.136:E / AndroidRuntime(1103):致命异常:主要 08-08 01:50:22.136:E / AndroidRuntime(1103):处理:in.acsg,PID:1103 08-08 01:50:22.136:E / AndroidRuntime(1103):java.lang.RuntimeException:传递结果失败ResultInfo {who = android:fragment:1,request = 1,result = -1,data = Intent {dat = content:// media / external / images / media / 42}} to activity {in.acsg / in.acsg.HomeScrren}:java.lang.NullPointerException 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread.deliverResults(ActivityThread.java:3365) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread.handleSendResult(ActivityThread.java:3408) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread.access $ 1300(ActivityThread.java:135) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1244) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.os.Handler.dispatchMessage(Handler.java:102) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.os.Looper.loop(Looper.java:136) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread.main(ActivityThread.java:5017) 08-08 01:50:22.136:E / AndroidRuntime(1103):at java.lang.reflect.Method.invokeNative(Native Method) 08-08 01:50:22.136:E / AndroidRuntime(1103):at java.lang.reflect.Method.invoke(Method.java:515) 08-08 01:50:22.136:E / AndroidRuntime(1103):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779) 08-08 01:50:22.136:E / AndroidRuntime(1103):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 08-08 01:50:22.136:E / AndroidRuntime(1103):at dalvik.system.NativeStart.main(Native Method) 08-08 01:50:22.136:E / AndroidRuntime(1103):引起:java.lang.NullPointerException 08-08 01:50:22.136:E / AndroidRuntime(1103):at in.acsg.mainScreen.Publish.getPath(Publish.java:124) 08-08 01:50:22.136:E / AndroidRuntime(1103):at in.acsg.mainScreen.Publish.onActivityResult(Publish.java:109) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.Activity.dispatchActivityResult(Activity.java:5427) 08-08 01:50:22.136:E / AndroidRuntime(1103):在android.app.ActivityThread.deliverResults(ActivityThread.java:3361) 08-08 01:50:22.136:E / AndroidRuntime(1103):... 11更多 08-08 01:50:27.366:I / Choreographer(1173):跳过118帧!应用程序可能在其主线程上做了太多工作。 08-08 01:50:28.186:D / dalvikvm(1173):GC_FOR_ALLOC释放201K,9%免费2986K / 3272K,暂停39ms,总计40ms
请帮我解决这个问题
答案 0 :(得分:3)
onActivityResult()不会在Fragment中调用。
尝试,
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1);
确保您的父活动正在扩展FragmentActivity 覆盖FragmentActivity中的onActivityResult()
以下是我的应用中的代码段 (在我的片段类中)
private void captureImage() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageURI = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageURI);
startActivityForResult(intent, CAMERA_REQUEST_CODE);
}
(在我的父母活动中)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
答案 1 :(得分:0)
片段存在于一个活动中,因此你可以将作业委托给活动,你有活动(A),它包含片段(B),你想从片段(B)中上传一张图片,但是onActivityResult生命周期钩子不是从片段(B)触发的,所以你可以创建一个有一个方法的接口(C),当被触发时会在保存片段的活动中触发onActivityResult生命周期钩子
换句话说,: