Question

I need to disable the click-event for a button in Android. Just as a sample, I have tried doing the following. I have taken a TextView named it (entered a text) as Name. The condition checks if, TextView is empty button and clickable should be set to false. However this does not happen when the Toast is printed. Can somemone tell me the reason. Also if the text field is not empty I want to reset the clickable event for button as true.

Java File:

public class ButtonclickabkeActivity extends Activity {
    TextView tv;
    Button btn;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tv = (TextView) findViewById(R.id.textView1);
        tv.setText("Name");
        btn = (Button) findViewById(R.id.button1);

        if (tv.getText().toString().length() != 0) {
            btn.setClickable(false);
            Toast.makeText(getApplicationContext(), "" + tv.getText().toString().length(), Toast.LENGTH_LONG).show();
        } else {
            btn.setClickable(true);
        }
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Toast.makeText(getApplicationContext(), "Button clicked", Toast.LENGTH_LONG).show();
            }
        });
    }
}

XML file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/hello"/>
    <TextView 
        android:text="TextView" 
        android:id="@+id/textView1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>
    <Button 
        android:text="Button" 
        android:id="@+id/button1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>
</LinearLayout>

Answer 1

Use

btn.setEnable(false);

instead of

btn.setClickable(false);