Android custom dialog example

The following steps are for creating a basic custom dialog in Android by extending the Dialog class.

1. This is optional, but here is a drawable layout for making round corners for the custom dialog. dialog_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <solid android:color="#ffffff" />
    <stroke
        android:width="2dp"
        android:color="#01FFFF" />
    <corners android:radius="20dp"/>
</shape>

2. Create the layout file for the custom dialog. custom_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/dialog_shape"
    android:orientation="vertical" >
    <TextView
        android:id="@+id/tv_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="10dp"
        android:text="Are you sure you want to quit?"
        android:textStyle="bold"
        android:gravity="center"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tv_title"
        android:layout_margin="20dp"
        android:layout_gravity="center"
        android:gravity="center"
        android:orientation="horizontal" >
        <Button
            android:id="@+id/btn_no"
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:clickable="true"
            android:text="No"
            android:textColor="#f25a55"
            android:textStyle="bold" />
        <Button
            android:id="@+id/btn_yes"
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:clickable="true"
            android:text="Yes"
            android:textColor="#35e664"
            android:textStyle="bold" />
    </LinearLayout>

</RelativeLayout>

3. Create the custom class which extends from the Dialog class for the custom dialog.

public class CustomDialog extends Dialog implements
        android.view.View.OnClickListener {
    public Activity activity;
    public Button btnYes, btnNo;

    public CustomDialog(Activity activity) {
        super(activity);
        this.activity = activity;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.dialog_about);
        btnYes = (Button) findViewById(R.id.btn_yes);
        btnNo = (Button) findViewById(R.id.btn_no);
        btnYes.setOnClickListener(this);
        btnNo.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_yes:
                activity.finish();
                break;
            case R.id.btn_no:
                dismiss();
                break;
            default:
                break;
        }
        dismiss();
    }
}

4. Call the Custom Dialog.

CustomDialog customDialog = new CustomDialog(MainActivity.this);
customDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
customDialog.show();

5. Modify the custom layout to whatever fits your need.

Reference

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