[embedyt] https://www.youtube.com/watch?v=n2vcTdUpsLI[/embedyt]
Links & DependenciesImagesActivity.javaImageAdapter.javaactivity_images.xmlimage_item.xmlUpload.javaMainActivity.javaAndroidManifest.xmlactivity_main.xml
Dependencies + instructions:
developer.android.com/topic/libraries/support-library/packages.html#v7-cardview
developer.android.com/topic/libraries/support-library/packages.html#v7-recyclerview
package com.codinginflow.firebaseuploadexample; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.ProgressBar; import android.widget.Toast; import com.google.android.gms.tasks.OnSuccessListener; import com.google.firebase.database.DataSnapshot; import com.google.firebase.database.DatabaseError; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.database.ValueEventListener; import com.google.firebase.storage.FirebaseStorage; import com.google.firebase.storage.StorageReference; import java.util.ArrayList; import java.util.List; public class ImagesActivity extends AppCompatActivity implements ImageAdapter.OnItemClickListener { private RecyclerView mRecyclerView; private ImageAdapter mAdapter; private ProgressBar mProgressCircle; private FirebaseStorage mStorage; private DatabaseReference mDatabaseRef; private ValueEventListener mDBListener; private List<Upload> mUploads; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_images); mRecyclerView = findViewById(R.id.recycler_view); mRecyclerView.setHasFixedSize(true); mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); mProgressCircle = findViewById(R.id.progress_circle); mUploads = new ArrayList<>(); mAdapter = new ImageAdapter(ImagesActivity.this, mUploads); mRecyclerView.setAdapter(mAdapter); mAdapter.setOnItemClickListener(ImagesActivity.this); mStorage = FirebaseStorage.getInstance(); mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads"); mDBListener = mDatabaseRef.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { mUploads.clear(); for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) { Upload upload = postSnapshot.getValue(Upload.class); upload.setKey(postSnapshot.getKey()); mUploads.add(upload); } mAdapter.notifyDataSetChanged(); mProgressCircle.setVisibility(View.INVISIBLE); } @Override public void onCancelled(DatabaseError databaseError) { Toast.makeText(ImagesActivity.this, databaseError.getMessage(), Toast.LENGTH_SHORT).show(); mProgressCircle.setVisibility(View.INVISIBLE); } }); } @Override public void onItemClick(int position) { Toast.makeText(this, "Normal click at position: " + position, Toast.LENGTH_SHORT).show(); } @Override public void onWhatEverClick(int position) { Toast.makeText(this, "Whatever click at position: " + position, Toast.LENGTH_SHORT).show(); } @Override public void onDeleteClick(int position) { Upload selectedItem = mUploads.get(position); final String selectedKey = selectedItem.getKey(); StorageReference imageRef = mStorage.getReferenceFromUrl(selectedItem.getImageUrl()); imageRef.delete().addOnSuccessListener(new OnSuccessListener<Void>() { @Override public void onSuccess(Void aVoid) { mDatabaseRef.child(selectedKey).removeValue(); Toast.makeText(ImagesActivity.this, "Item deleted", Toast.LENGTH_SHORT).show(); } }); } @Override protected void onDestroy() { super.onDestroy(); mDatabaseRef.removeEventListener(mDBListener); } }
package com.codinginflow.firebaseuploadexample; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.ContextMenu; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import com.squareup.picasso.Picasso; import java.util.List; public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> { private Context mContext; private List<Upload> mUploads; private OnItemClickListener mListener; public ImageAdapter(Context context, List<Upload> uploads) { mContext = context; mUploads = uploads; } @Override public ImageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View v = LayoutInflater.from(mContext).inflate(R.layout.image_item, parent, false); return new ImageViewHolder(v); } @Override public void onBindViewHolder(ImageViewHolder holder, int position) { Upload uploadCurrent = mUploads.get(position); holder.textViewName.setText(uploadCurrent.getName()); Picasso.with(mContext) .load(uploadCurrent.getImageUrl()) .placeholder(R.mipmap.ic_launcher) .fit() .centerCrop() .into(holder.imageView); } @Override public int getItemCount() { return mUploads.size(); } public class ImageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnCreateContextMenuListener, MenuItem.OnMenuItemClickListener { public TextView textViewName; public ImageView imageView; public ImageViewHolder(View itemView) { super(itemView); textViewName = itemView.findViewById(R.id.text_view_name); imageView = itemView.findViewById(R.id.image_view_upload); itemView.setOnClickListener(this); itemView.setOnCreateContextMenuListener(this); } @Override public void onClick(View v) { if (mListener != null) { int position = getAdapterPosition(); if (position != RecyclerView.NO_POSITION) { mListener.onItemClick(position); } } } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { menu.setHeaderTitle("Select Action"); MenuItem doWhatever = menu.add(Menu.NONE, 1, 1, "Do whatever"); MenuItem delete = menu.add(Menu.NONE, 2, 2, "Delete"); doWhatever.setOnMenuItemClickListener(this); delete.setOnMenuItemClickListener(this); } @Override public boolean onMenuItemClick(MenuItem item) { if (mListener != null) { int position = getAdapterPosition(); if (position != RecyclerView.NO_POSITION) { switch (item.getItemId()) { case 1: mListener.onWhatEverClick(position); return true; case 2: mListener.onDeleteClick(position); return true; } } } return false; } } public interface OnItemClickListener { void onItemClick(int position); void onWhatEverClick(int position); void onDeleteClick(int position); } public void setOnItemClickListener(OnItemClickListener listener) { mListener = listener; } }
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.codinginflow.firebaseuploadexample.ImagesActivity"> <ProgressBar android:id="@+id/progress_circle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" /> <android.support.v7.widget.RecyclerView android:id="@+id/recycler_view" android:layout_width="match_parent" android:layout_height="match_parent" /> </RelativeLayout>
<?xml version="1.0" encoding="utf-8"?> <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="8dp"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/text_view_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginBottom="8dp" android:layout_marginTop="8dp" android:text="Name" android:textColor="@android:color/black" android:textSize="20sp" /> <ImageView android:id="@+id/image_view_upload" android:layout_width="match_parent" android:layout_height="200dp" /> </LinearLayout> </android.support.v7.widget.CardView>
package com.codinginflow.firebaseuploadexample; import com.google.firebase.database.Exclude; public class Upload { private String mName; private String mImageUrl; private String mKey; public Upload() { //empty constructor needed } public Upload(String name, String imageUrl) { if (name.trim().equals("")) { name = "No Name"; } mName = name; mImageUrl = imageUrl; } public String getName() { return mName; } public void setName(String name) { mName = name; } public String getImageUrl() { return mImageUrl; } public void setImageUrl(String imageUrl) { mImageUrl = imageUrl; } @Exclude public String getKey() { return mKey; } @Exclude public void setKey(String key) { mKey = key; } }
package com.codinginflow.firebaseuploadexample; import android.content.ContentResolver; import android.content.Intent; import android.net.Uri; import android.os.Handler; import android.support.annotation.NonNull; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.webkit.MimeTypeMap; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.tasks.OnFailureListener; import com.google.android.gms.tasks.OnSuccessListener; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.storage.FirebaseStorage; import com.google.firebase.storage.OnProgressListener; import com.google.firebase.storage.StorageReference; import com.google.firebase.storage.StorageTask; import com.google.firebase.storage.UploadTask; import com.squareup.picasso.Picasso; public class MainActivity extends AppCompatActivity { private static final int PICK_IMAGE_REQUEST = 1; private Button mButtonChooseImage; private Button mButtonUpload; private TextView mTextViewShowUploads; private EditText mEditTextFileName; private ImageView mImageView; private ProgressBar mProgressBar; private Uri mImageUri; private StorageReference mStorageRef; private DatabaseReference mDatabaseRef; private StorageTask mUploadTask; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mButtonChooseImage = findViewById(R.id.button_choose_image); mButtonUpload = findViewById(R.id.button_upload); mTextViewShowUploads = findViewById(R.id.text_view_show_uploads); mEditTextFileName = findViewById(R.id.edit_text_file_name); mImageView = findViewById(R.id.image_view); mProgressBar = findViewById(R.id.progress_bar); mStorageRef = FirebaseStorage.getInstance().getReference("uploads"); mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads"); mButtonChooseImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { openFileChooser(); } }); mButtonUpload.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mUploadTask != null && mUploadTask.isInProgress()) { Toast.makeText(MainActivity.this, "Upload in progress", Toast.LENGTH_SHORT).show(); } else { uploadFile(); } } }); mTextViewShowUploads.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { openImagesActivity(); } }); } private void openFileChooser() { Intent intent = new Intent(); intent.setType("image/*"); intent.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(intent, PICK_IMAGE_REQUEST); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) { mImageUri = data.getData(); Picasso.with(this).load(mImageUri).into(mImageView); } } private String getFileExtension(Uri uri) { ContentResolver cR = getContentResolver(); MimeTypeMap mime = MimeTypeMap.getSingleton(); return mime.getExtensionFromMimeType(cR.getType(uri)); } private void uploadFile() { if (mImageUri != null) { StorageReference fileReference = mStorageRef.child(System.currentTimeMillis() + "." + getFileExtension(mImageUri)); mUploadTask = fileReference.putFile(mImageUri) .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { @Override public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { Handler handler = new Handler(); handler.postDelayed(new Runnable() { @Override public void run() { mProgressBar.setProgress(0); } }, 500); Toast.makeText(MainActivity.this, "Upload successful", Toast.LENGTH_LONG).show(); Upload upload = new Upload(mEditTextFileName.getText().toString().trim(), taskSnapshot.getDownloadUrl().toString()); String uploadId = mDatabaseRef.push().getKey(); mDatabaseRef.child(uploadId).setValue(upload); } }) .addOnFailureListener(new OnFailureListener() { @Override public void onFailure(@NonNull Exception e) { Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show(); } }) .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() { @Override public void onProgress(UploadTask.TaskSnapshot taskSnapshot) { double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount()); mProgressBar.setProgress((int) progress); } }); } else { Toast.makeText(this, "No file selected", Toast.LENGTH_SHORT).show(); } } private void openImagesActivity() { Intent intent = new Intent(this, ImagesActivity.class); startActivity(intent); } }
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.codinginflow.firebaseuploadexample"> <uses-permission android:name="android.permission.INTERNET" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".ImagesActivity"></activity> </application> </manifest>
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp" tools:context="com.codinginflow.firebaseuploadexample.MainActivity"> <Button android:id="@+id/button_choose_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Choose file" /> <EditText android:id="@+id/edit_text_file_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginStart="16dp" android:layout_toEndOf="@+id/button_choose_image" android:hint="Enter file name" /> <ImageView android:id="@+id/image_view" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_above="@id/progress_bar" android:layout_below="@id/edit_text_file_name" android:layout_marginTop="16dp" /> <ProgressBar android:id="@+id/progress_bar" style="@style/Widget.AppCompat.ProgressBar.Horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/button_upload" android:layout_alignParentStart="true" android:layout_marginBottom="16dp" /> <Button android:id="@+id/button_upload" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="Upload" /> <TextView android:id="@+id/text_view_show_uploads" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/button_upload" android:layout_alignTop="@+id/button_upload" android:layout_marginStart="25dp" android:layout_toEndOf="@+id/button_upload" android:gravity="center" android:text="Show Uploads" android:textSize="16sp" /> </RelativeLayout>