Question

Hello I want that my methods work instantly when the user enters the application. For now I have an onClick event in my xml which activates so to say my methods(this works).

the xml:

            <TextView
            android:id="@+id/cd_start"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:paddingBottom="0dp"
            android:text="time"
            android:textColor="#000"
            android:textSize="21sp"
            android:onClick="dateEnd"/>

and Main Activity.java

String dateStopKukuk = "21 Dec 2015";

private void displayDateEnd(String etime) {
    TextView priceTextView = (TextView) findViewById(R.id.cd_start);
    priceTextView.setText(etime);
}

public void dateEnd(View v) {
    displayDateEnd(dateStopKukuk);
}

Answer 1

Edit: I added a comments to explain you this code.

Try this:

import android.app.Activity;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity implements View.OnClickListener 
{

    // onClick method is called when one of view is clicked. (you must use setOnClickListener on this View to inform system to call this)
    @Override
    public void onClick(View v)
    {
        // check if clicked view is cd_start
        if(v.getId() == R.id.cd_start)
        {
             // true cd_start is clicked
             displayDateEnd(dateStopKukuk);
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState); // REQUIRED!!! When you don't add this your app will be crash.
        setContentView(R.layout.activity_main); // sets activity_main as layout (if you use different name of layout replace activity_name with your layout name)
        findViewById(R.id.cd_start).setOnClickListener(this); // finds view with cd_start id and sets click listener. When this view is clicked system calls onClick method.
        // and now your code what do you want to do when activity is creating.
    }

    String dateStopKukuk = "21 Dec 2015";

    private void displayDateEnd(String etime) {
        TextView priceTextView = (TextView) findViewById(R.id.cd_start);
        priceTextView.setText(etime);
    }

    /* You don't need dateEnd method now */
}

XML:

        <TextView
            android:id="@+id/cd_start"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:paddingBottom="0dp"
            android:text="time"
            android:textColor="#000"
            android:textSize="21sp"
            /> <!-- You don't need android:onClick -->

In your activity.

I hope it helped you.

Android Java Occur a method event

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