Uploading Images to Firebase Storage

Author: dragosholban

.idea/caches/build_file_checksums.ser

@@ -27,6 +27,7 @@ dependencies {
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     implementation 'com.google.firebase:firebase-core:15.0.0'
     implementation 'com.firebaseui:firebase-ui-auth:3.3.1'
+    implementation 'com.google.firebase:firebase-storage:15.0.0'
 }
 
 apply plugin: 'com.google.gms.google-services'

app/build.gradle

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.dragosholban.myinstagramapp">
 
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -18,7 +20,9 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity android:name=".FeedActivity"></activity>
+        <activity
+            android:name=".FeedActivity"
+            android:screenOrientation="portrait"></activity>
     </application>
 
 </manifest>

app/src/main/AndroidManifest.xml

@@ -1,18 +1,93 @@
 package com.dragosholban.myinstagramapp;
 
+import android.Manifest;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
+import android.widget.Toast;
+
+import com.google.android.gms.tasks.OnFailureListener;
+import com.google.android.gms.tasks.OnSuccessListener;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.auth.FirebaseUser;
+import com.google.firebase.storage.FirebaseStorage;
+import com.google.firebase.storage.StorageReference;
+import com.google.firebase.storage.UploadTask;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
 
 public class FeedActivity extends AppCompatActivity {
 
+    FirebaseUser fbUser;
+
+    static final int RC_PERMISSION_READ_EXTERNAL_STORAGE = 1;
+    static final int RC_IMAGE_GALLERY = 2;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_feed);
+
+        fbUser = FirebaseAuth.getInstance().getCurrentUser();
+        if (fbUser == null) {
+            finish();
+        }
     }
 
     public void uploadImage(View view) {
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.READ_EXTERNAL_STORAGE}, RC_PERMISSION_READ_EXTERNAL_STORAGE);
+        } else {
+            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+            intent.setType("image/*");
+            startActivityForResult(intent, RC_IMAGE_GALLERY);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode == RC_PERMISSION_READ_EXTERNAL_STORAGE) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+                intent.setType("image/*");
+                startActivityForResult(intent, RC_IMAGE_GALLERY);
+            }
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (requestCode == RC_IMAGE_GALLERY && resultCode == RESULT_OK) {
+            Uri uri = data.getData();
+
+            StorageReference storageRef = FirebaseStorage.getInstance().getReference();
+            StorageReference imagesRef = storageRef.child("images");
+            StorageReference userRef = imagesRef.child(fbUser.getUid());
+            String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
+            String filename = fbUser.getUid() + "_" + timeStamp;
+            StorageReference fileRef = userRef.child(filename);
 
+            UploadTask uploadTask = fileRef.putFile(uri);
+            uploadTask.addOnFailureListener(new OnFailureListener() {
+                @Override
+                public void onFailure(@NonNull Exception exception) {
+                    // Handle unsuccessful uploads
+                    Toast.makeText(FeedActivity.this, "Upload failed!\n" + exception.getMessage(), Toast.LENGTH_LONG).show();
+                }
+            }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
+                @Override
+                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
+                    Uri downloadUrl = taskSnapshot.getDownloadUrl();
+                    Toast.makeText(FeedActivity.this, "Upload finished!", Toast.LENGTH_SHORT).show();
+                }
+            });
+        }
     }
 }