Android: Use a SWITCH statement with setOnClickListener/onClick for more than 1 button?


Question

Let's say I have a few buttons in a LinearLayout, 2 of them are:

mycards_button = ((Button)this.findViewById(R.id.Button_MyCards));
exit_button = ((Button)this.findViewById(R.id.Button_Exit));

I register setOnClickListener() on both of them:

mycards_button.setOnClickListener(this);
exit_button.setOnClickListener(this);

How do I make a SWITCH to differentiate between the two buttons within the Onclick ?

public void onClick(View v) {
  switch(?????){
    case ???:
      /** Start a new Activity MyCards.java */
      Intent intent = new Intent(this, MyCards.class);
      this.startActivity(intent);
      break;
    case ???:
      /** AlerDialog when click on Exit */
      MyAlertDialog();
      break;
}
1
44
10/6/2012 3:26:33 PM

Accepted Answer

Use:

  public void onClick(View v) {

    switch(v.getId()){

      case R.id.Button_MyCards: /** Start a new Activity MyCards.java */
        Intent intent = new Intent(this, MyCards.class);
        this.startActivity(intent);
        break;

      case R.id.Button_Exit: /** AlerDialog when click on Exit */
        MyAlertDialog();
        break;
    }
}

Note that this will not work in Android library projects (due to http://tools.android.com/tips/non-constant-fields) where you will need to use something like:

int id = view.getId();
if (id == R.id.Button_MyCards) {
    action1();
} else if (id == R.id.Button_Exit) {
    action2();
}
115
11/20/2014 12:09:38 PM

Another option is to add a new OnClickListener as parameter in setOnClickListener() and overriding the onClick()-method:

mycards_button = ((Button)this.findViewById(R.id.Button_MyCards)); 
exit_button = ((Button)this.findViewById(R.id.Button_Exit));

// Add onClickListener to mycards_button
mycards_button.setOnClickListener(new OnClickListener() {
    public void onClick(View view) {
        // Start new activity
        Intent intent = new Intent(this, MyCards.class);
        this.startActivity(intent);
    }
});

// Add onClickListener to exit_button
exit_button.setOnClickListener(new OnClickListener() {
    public void onClick(View view) {
        // Display alertDialog
        MyAlertDialog();
    }
});

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