Why this java code not working?

newbiedeveloper · September 12, 2020, 1:25pm

really i don't have any idea about java.
please re-edit this

deanart2012 · September 12, 2020, 1:43pm

This is why it’s so important for you to do it yourself. It’s the only way you will learn.

Souvik_Bera · September 12, 2020, 1:47pm

If you don't know java you should consider learning Java first then build some basic extensions.

newbiedeveloper · September 12, 2020, 2:47pm

but it will give me an idea.
please help me

deanart2012 · September 12, 2020, 2:59pm

You’ve been given help in post #2. You are refusing to do anything yourself. At this point you are now spamming by asking for help over and over again.

Kumaraswamy · September 13, 2020, 9:01am

I am also new to java and extension development.

Some steps which I followed.

Daily watch tutorials and guides on youtube, approx 1 hour.
Trying to build extension!
Results - If fail
Do some research in google/stackoverflow
If it doesn't help me
Get help from others (not to ask full)
Else - Next code

You know today I took more than 2 hours solving problems in my BinaryTools extension, finally passed!

newbiedeveloper · September 14, 2020, 7:59am

what to use in that case

ewpatton · September 14, 2020, 6:03pm

I don't know. As the others have stated, you may want to start simple first and learn how to build a component and an extension for App Inventor before getting too complicated. As I mentioned in my earlier statements, you likely aren't going to be able to make this work due to issue #2.

newbiedeveloper · September 15, 2020, 5:36pm

thanks, i have learn many things.
but i am still getting error.

please check my Modified code

package com.ads.inter;  

import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.DesignerProperty;
import com.google.appinventor.components.annotations.PropertyCategory;
import com.google.appinventor.components.annotations.SimpleEvent;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.annotations.SimpleObject;
import com.google.appinventor.components.annotations.SimpleProperty;
import com.google.appinventor.components.common.ComponentCategory;
import com.google.appinventor.components.common.PropertyTypeConstants;
import com.google.appinventor.components.runtime.util.MediaUtil;
import com.google.appinventor.components.runtime.*;
  
import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.runtime.*;
import com.google.appinventor.components.common.*;
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;
  
import com.google.android.gms.ads.AdListener;  
import com.google.android.gms.ads.AdRequest;  
import com.google.android.gms.ads.InterstitialAd;  
  
@DesignerComponent(version = 1, // Update version here, You must do for each new release to upgrade your extension
               description = "interads",
               category = ComponentCategory.EXTENSION,
               nonVisible = true,
               iconName = "images/extension.png") // Change your extension's icon from here; can be a direct url
@SimpleObject(external = true)
public class interads extends AndroidNonvisibleComponent {  
InterstitialAd mInterstitialAd;  
  
@Override  
protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.activity_interstitial_ads);  
    mInterstitialAd = new InterstitialAd(this);  
  
    // set the ad unit ID  
@SimpleFunction
public String SetAdUnit(String UnitId) {
    mInterstitialAd.setAdUnitId(UnitId);  
 }
  
    AdRequest adRequest = new AdRequest.Builder().build();  
  
    // Load ads into Interstitial Ads  
 @SimpleFunction
public String LoadAd{
    mInterstitialAd.loadAd(adRequest);  
  
    @SimpleEvent
	public void onAdLoaded{  
           EventDispatcher.dispatchEvent(this, "onAdLoaded");  
        }    
}  

  @Override
private void showInterstitial{  
    if (mInterstitialAd.isLoaded()) {  
        mInterstitialAd.show();  
    }  
}  
  
  
}

Kumaraswamy · September 16, 2020, 2:51am

You have referred my code right?

WatermelonIce · September 16, 2020, 4:02am

???

You didn't return anything. If you don't want to return anything, add void keyword.
Secondly, many of your method don't have () parameters

Thirdly, to make a proper event,

@SimpleEvent(description = "Description here")
public void onAdLoaded(){
   EventDispatcher.dispatchEvent(this, "onAdLoaded");
}

@SimpleFunction(description = "") 
public void LoadAd() {
  //Your code
  onAdLoaded();
}

Kumaraswamy · September 16, 2020, 4:03am

He had asked me for source of old binary extension...

WatermelonIce · September 16, 2020, 4:15am

But this is an ad extension.

Kumaraswamy · September 16, 2020, 4:15am

Just he wants to know how extension is made...

newbiedeveloper · September 16, 2020, 4:57am

it's still not working please help me.
can you edit my file please.
here is my code

package com.ads.inter;  

import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.DesignerProperty;
import com.google.appinventor.components.annotations.PropertyCategory;
import com.google.appinventor.components.annotations.SimpleEvent;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.annotations.SimpleObject;
import com.google.appinventor.components.annotations.SimpleProperty;
import com.google.appinventor.components.common.ComponentCategory;
import com.google.appinventor.components.common.PropertyTypeConstants;
import com.google.appinventor.components.runtime.util.MediaUtil;
import com.google.appinventor.components.runtime.*;
  
import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.runtime.*;
import com.google.appinventor.components.common.*;
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;
  
import com.google.android.gms.ads.AdListener;  
import com.google.android.gms.ads.AdRequest;  
import com.google.android.gms.ads.InterstitialAd;  
  
@DesignerComponent(version = 1, // Update version here, You must do for each new release to upgrade your extension
                   description = "interads",
                   category = ComponentCategory.EXTENSION,
                   nonVisible = true,
                   iconName = "images/extension.png") // Change your extension's icon from here; can be a direct url
@SimpleObject(external = true)
public class interads extends AndroidNonvisibleComponent {  
    InterstitialAd mInterstitialAd;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_interstitial_ads);  
        mInterstitialAd = new InterstitialAd(this);  
  
        // set the ad unit ID  
    @SimpleFunction
    public String SetAdUnit(String UnitId) {
        mInterstitialAd.setAdUnitId(UnitId);  
     }
  
        AdRequest adRequest = new AdRequest.Builder().build();  
  
        // Load ads into Interstitial Ads  
 @SimpleFunction(description = "load ad")
    public void LoadAd{
        mInterstitialAd.loadAd(adRequest);  
  }
        
@SimpleEvent(description = "On ad loaded")
public void onAdLoaded(){
   EventDispatcher.dispatchEvent(this, "onAdLoaded");
}

  @Override
    private void showInterstitial{  
        if (mInterstitialAd.isLoaded()) {  
            mInterstitialAd.show();  
        }  
    }  
  
  
}

Kumaraswamy · September 16, 2020, 5:02am

First try to make small extension, they try big.

WatermelonIce · September 16, 2020, 5:03am

You didn't follow what I have said

newbiedeveloper · September 16, 2020, 5:03am

i am doing but i want to make some big.
so, please help me

newbiedeveloper · September 16, 2020, 5:03am

can you show me where i have to add this parameters

Techno_Vedang · September 16, 2020, 5:04am

The real issue is this

issue