#32 interacting with RPC with web3j

Hanium-Blocker · Oct 17, 2018 · 9bb156d · 9bb156d
1 parent b2ace70
commit 9bb156d
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diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
@@ -8,6 +8,7 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
+
     <application
         android:name=".BlockerApplication"
         android:largeHeap="true"

diff --git a/app/src/main/java/com/example/choejun_yeong/blocker_android/activity/LoginActivity.java b/app/src/main/java/com/example/choejun_yeong/blocker_android/activity/LoginActivity.java
@@ -9,6 +9,7 @@
 import com.example.choejun_yeong.blocker_android.R;
 import com.example.choejun_yeong.blocker_android.fragment.login.LoginFragment;
 
+
 public class LoginActivity extends AppCompatActivity{
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {

diff --git a/app/src/main/java/com/example/choejun_yeong/blocker_android/activity/WalletActivity.java b/app/src/main/java/com/example/choejun_yeong/blocker_android/activity/WalletActivity.java
@@ -2,18 +2,29 @@
 
 
 import android.Manifest;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v7.app.AppCompatActivity;
+import android.widget.Toast;
 
 import com.example.choejun_yeong.blocker_android.R;
 import com.example.choejun_yeong.blocker_android.fragment.wallet.WalletFragment;
 import com.gun0912.tedpermission.PermissionListener;
 import com.gun0912.tedpermission.TedPermission;
 
+import org.web3j.protocol.Web3j;
+import org.web3j.protocol.Web3jFactory;
+import org.web3j.protocol.core.methods.response.Web3ClientVersion;
+import org.web3j.protocol.http.HttpService;
+
+import java.io.IOException;
 import java.util.ArrayList;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
 
 public class WalletActivity extends AppCompatActivity {
     @Override
@@ -45,5 +56,17 @@ public void onPermissionDenied(ArrayList<String> deniedPermissions) {
                 .setPermissions(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE)
                 .check();
 
+        // web3
+        Web3j web3j = Web3jFactory.build(new HttpService("https://rinkeby.infura.io/v3/de770d2ce1834cc794cfd6dfe42fb83d"));
+        Web3ClientVersion web3ClientVersion = null;
+        try {
+            web3ClientVersion = web3j.web3ClientVersion().sendAsync().get();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        } catch (ExecutionException e) {
+            e.printStackTrace();
+        }
+        String ClientVersionString = web3ClientVersion.getWeb3ClientVersion();
+        Toast.makeText(this, "Clientversion: " + ClientVersionString, Toast.LENGTH_SHORT).show();
     }
 }