从操作栏菜单项单击调用活动

Question

I have 1 Fragment and 2 activities: HomeFragment , ProductActivity , and CartActivity . I want to call CartActivity whenever I click on the cart in the menu. But when I tap on 1 product in HomeFrament , my app calls ProductActivity and CartActivity under ProductActivity .

I am using implementation androidx.appcompat:appcompat:1.0.2 .

In Product.java, I call Cart Activity in onOptionsItemSelected

// Click on option button.
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
    int id = item.getItemId();

    switch (id){
        case android.R.id.home: {
            this.finish();
        }
        case R.id.app_bar_cart: {
            Log.d(TAG,"Cart Clicked");
            Intent intent = new Intent(this, Cart.class);
            //intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
            return true;
        }
    }
    return super.onOptionsItemSelected(item);
}

My manifest file:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.project.coconuc">

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">
        <activity android:name=".Cart"/>
        <activity android:name=".product" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

onClick call products

    @Override
    public void onClick(Integer position) {
        Intent callProductActivity = new Intent(mfragment.getActivity(), product.class);
        callProductActivity.putExtra("variable", position.toString());
        Objects.requireNonNull(mfragment.getActivity()).startActivity(callProductActivity);
    }

For more details, please see this image: https://ibb.co/mFFZC30

This is my code: https://github.com/KhoaChau0594/MoblileAppProject/tree/temp

Answer 1

I have solved my problem. It caused because the implement of the toolbar back button in the product activity. I have to use getSupportActionBar() instead of getActionBar().

This is how i implement back button

        Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);