SurfaceView Example

Question

So I've spent about two days trying to get a working SurfaceView. Tutorials I am following online aren't working even when followed to the letter. I normally get an entirely black screen.

In order to help teach myself how it works I need a working SurfaceView program.

I'm looking for a program that has the SurfaceView generated in a separate class. I would be very grateful if someone is able to post full code (XML and Java) for a SurfaceView program that simply turns the entire screen Red or White.

Thank you for any help!

(Any explanations along with the code would be amazing!)

Answer 1

Try this link

Ansroid SurfaceView Example

I have follow this tutorial example. It works fine.

Edit

Simple Code for SurfaceView

Layout xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          android:id="@+id/container"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical">
<SurfaceView
    android:id="@+id/surfaceView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"/>
</LinearLayout>

Java Activity Code

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.SurfaceView;
import android.view.ViewGroup;
import android.view.WindowManager;

public class Main2Activity extends AppCompatActivity{


  SurfaceView surfaceView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
    //Method for making the activity full screen
    //With SurfaceView
    makeItFullScreen();
  }

  private void makeItFullScreen(){
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getSupportActionBar().hide();
    //Changing SurfaceView background color
    surfaceView.setBackgroundColor(Color.RED);

    DisplayMetrics displayMetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

    ViewGroup.LayoutParams videoLayoutParams = surfaceView.getLayoutParams();
    videoLayoutParams.width = displayMetrics.widthPixels;
    videoLayoutParams.height = displayMetrics.heightPixels;

    ViewGroup.LayoutParams videoParams = surfaceView.getLayoutParams();
    videoParams.width = displayMetrics.widthPixels;
    videoParams.height = displayMetrics.heightPixels;
  }

}

Edit2

If you use custom SurfaceView xml will be like this..

<customClassPackageName.CustomSurfaceViewClassName
    android:id="@+id/surfaceView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"/>

Code inside Activity

  .......
  customClassPackageName.CustomSurfaceViewClassName surfaceView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    surfaceView = (customClassPackageName.CustomSurfaceViewClassName) findViewById(R.id.surfaceView);
    .......