I'm developing this app just for learning, so it has just one "upload" button. Pressing it should store all the contacts in a JSON file and then upload the JSON file to firebase storage.
The code works fine up to the JSON File creation but the app crashes as soon as the uploadToServer method starts executing. Here is my code...
package com.example.shiv.uploadcontacts;
import android.app.ProgressDialog;
import android.database.Cursor;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.provider.ContactsContract;
import android.widget.Toast;
import java.io.BufferedWriter;
import java.io.File;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.OnProgressListener;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import org.json.JSONObject;
import java.io.FileWriter;
import java.io.Writer;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = "shivanshTag";
Button uploadButton;
private Uri filePath;
JSONObject contacts;
private StorageReference mStorageRef;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
uploadButton = (Button) findViewById(R.id.uploadButton);
uploadButton.setOnClickListener(this);
mStorageRef = FirebaseStorage.getInstance().getReference();
}
@Override
public void onClick(View v) {
contacts = createContactJSON(); //Contacts added to a JSON Object
Log.i(TAG, ""+contacts);
filePath = listToFile(); //JSON file saved to filePath
Log.i(TAG, "File done");
uploadToServer(); //App crashes in this method
}
public JSONObject createContactJSON(){
//to store name-number pair
JSONObject contacts = new JSONObject();
try {
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
while (phones.moveToNext()) {
String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contacts.put(name, phoneNumber);
}
phones.close();
}
catch (Exception e){
e.printStackTrace();
}
return contacts;
}
private Uri listToFile() {
String path = null;
try {
Writer output = null;
path = "/sdcard/sample.json";
File file = new File(path);
output = new BufferedWriter(new FileWriter(file));
output.write(contacts.toString());
output.close();
Toast.makeText(getApplicationContext(), "Saved", Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
finish();
return Uri.fromFile(new File("/sdcard/sample.json"));
}
//this method will upload the file
private void uploadToServer() {
//if there is a file to upload
if (filePath != null) {
//displaying a progress dialog while upload is going on
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setTitle("Uploading...");
progressDialog.show();
StorageReference riversRef = mStorageRef.child("jsonFile/sample.json");
riversRef.putFile(filePath)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "File Uploaded", Toast.LENGTH_LONG).show();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), exception.getMessage(), Toast.LENGTH_LONG).show();
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
Log.i(TAG, "Here");
double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
progressDialog.setMessage("Uploaded " + ((int) progress) + "%...");
}
});
}
//if there is not any file
else {
Log.i(TAG, "Error");
Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_LONG).show();
}
}
}
I'm a newbie to android, so forgive any silly mistakes.
This is the Logcat...
--------- beginning of crash
06-07 11:37:32.662 19856-19856/com.example.shiv.uploadcontacts E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.shiv.uploadcontacts, PID: 19856
java.lang.IllegalArgumentException: View=DecorView@897e1ab[Uploading] not attached to window manager
at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:485)
at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:394)
at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:124)
at android.app.Dialog.dismissDialog(Dialog.java:371)
at android.app.Dialog.dismiss(Dialog.java:354)
at com.example.shiv.uploadcontacts.MainActivity$3.onSuccess(MainActivity.java:116)
at com.example.shiv.uploadcontacts.MainActivity$3.onSuccess(MainActivity.java:113)
at com.google.firebase.storage.zzj.zzi(Unknown Source:13)
at com.google.firebase.storage.zzaa.run(Unknown Source:10)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
