Backgrand image java

Question

Ich möchte ein Bild im Hintergrund auf Android Studio hinzufügen, aber ich habe keine Ahnung, wie es geht. In dem Code unten habe ich öffentliche statische endgültige Farbe BACKGROUND_COLOR = Color.WHITE ;, aber ich möchte es ändern, wenn der Hintergrund ein Bild, keine Farbe ist. Wie mache ich das? Dank

package com.udacity.gamedev.icicles; 

import com.badlogic.gdx.graphics.Color; 
import com.badlogic.gdx.math.Vector2; 


public class Constants { 
    public static final float WORLD_SIZE = 10.0f; 
    public static final Color BACKGROUND_COLOR = Color.WHITE; 


    public static final float PLAYER_HEAD_RADIUS = 0.5f; 
    public static final float PLAYER_HEAD_HEIGHT = 4.0f * PLAYER_HEAD_RADIUS; 
    public static final float PLAYER_LIMB_WIDTH = 0.1f; 
    public static final int PLAYER_HEAD_SEGMENTS = 20; 
    public static final Color PLAYER_COLOR = Color.BLACK; 
    public static final float PLAYER_MOVEMENT_SPEED = 10.0f; 

    public static final float ACCELEROMETER_SENSITIVITY = 0.5f; 
    public static final float GRAVITATIONAL_ACCELERATION = 9.8f; 

    public static final float ICICLES_HEIGHT = 1.0f; 
    public static final float ICICLES_WIDTH = 0.5f; 
    public static final Vector2 ICICLES_ACCELERATION = new Vector2(0, -5.0f); 
    public static final Color ICICLE_COLOR = Color.WHITE; 

    public static final float HUD_FONT_REFERENCE_SCREEN_SIZE = 480.0f; 
    public static final float HUD_MARGIN = 20.0f; 

    public static final String ASY_LABEL = "Hillary"; 
    public static final String EDIUM_LABEL = "Sanders"; 
    public static final String ARD_LABEL = "Next"; 
    public static final String ONE_LABEL = "Carson"; 
    public static final String EASY_LABEL = "Ted"; 
    public static final String MEDIUM_LABEL = "Rubio"; 
    public static final String HARD_LABEL = "Trump"; 
    public static final String SAM_LABEL = "Next"; 

    public static final float ASY_SPAWNS_PER_SECOND = 10; 
    public static final float EDIUM_SPAWNS_PER_SECOND = 15; 
    public static final float ARD_SPAWNS_PER_SECOND = 20; 
    public static final float ONE_SPAWNS_PER_SECOND = 5; 
    public static final float EASY_SPAWNS_PER_SECOND = 10; 
    public static final float MEDIUM_SPAWNS_PER_SECOND = 15; 
    public static final float HARD_SPAWNS_PER_SECOND = 20; 
    public static final float SAM_SPAWNS_PER_SECOND = 25; 

    // TODO: Add constants for the color of each difficulty select circle 
    public static final Color ASY_COLOR = new Color(0xff0000ff); 
    public static final Color EDIUM_COLOR = new Color(0xff0000ff); 
    public static final Color ARD_COLOR = new Color(0, 0, 0, 1); 
    public static final Color ONE_COLOR = new Color(0, 0, 1, 1); 
    public static final Color EASY_COLOR = new Color(0, 0, 1, 1); 
    public static final Color MEDIUM_COLOR = new Color(0, 0, 1, 1); 
    public static final Color HARD_COLOR = new Color(0, 0, 1, 1); 
    public static final Color SAM_COLOR = new Color(0, 0, 0, 1); 

    // TODO: Add constant for the size of the difficulty world 
    public static final float DIFFICULTY_WORLD_SIZE = 780.0f; 

    // TODO: Add constant for the radius of the difficulty select "buttons" 
    public static final float DIFFICULTY_BUBBLE_RADIUS = DIFFICULTY_WORLD_SIZE/12; 

    // TODO: Add constant for the scale of the difficulty labels (1.5 works well) 
    public static final float DIFFICULTY_LABEL_SCALE = 1.5f; 

    // TODO: Add Vector2 constants for the centers of the difficulty select buttons 
    public static final Vector2 ASY_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/2, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 EDIUM_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/3, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 ARD_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/6, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 ONE_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE* 2/3, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 EASY_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/2, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 MEDIUM_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/3, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 HARD_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE * 2/3, DIFFICULTY_WORLD_SIZE/2); 
    public static final Vector2 SAM_CENTER = new Vector2(DIFFICULTY_WORLD_SIZE/6, DIFFICULTY_WORLD_SIZE/2); 


    public enum Difficulty { 
     ASY(ASY_SPAWNS_PER_SECOND, ASY_LABEL), 
     EDIUM(EDIUM_SPAWNS_PER_SECOND, EDIUM_LABEL), 
     ARD(ARD_SPAWNS_PER_SECOND, ARD_LABEL), 
     ONE(ONE_SPAWNS_PER_SECOND, ONE_LABEL), 
     EASY(EASY_SPAWNS_PER_SECOND, EASY_LABEL), 
     MEDIUM(MEDIUM_SPAWNS_PER_SECOND, MEDIUM_LABEL), 
     HARD(HARD_SPAWNS_PER_SECOND, HARD_LABEL), 
     SAM(SAM_SPAWNS_PER_SECOND, SAM_LABEL); 

     float spawnRate; 
     String label; 

     Difficulty(float spawnRate, String label) { 
      this.spawnRate = spawnRate; 
      this.label = label; 
     } 
    } 
} 

Answer 1

Im Allgemeinen, wenn Sie ein konstantes Bild auf einem Hintergrund Layout verwenden anwenden möchten, können Sie das Bild in den ziehbar Ordner in Ihrem Projekt kopieren und etwas tun, wie folgt aus:

Drawable ziehbar = ContextCompat. getDrawable (MainActivity.this, R.drawable.storm); screenLayout.setBackground (Zeichen);

Answer 2

Fügen Sie einfach die folgende Zeile in Ihr XML-Layout ein.

android:background="@drawable/background" 

Fügen Sie dann Ihr Bild in den Zeichnungsordner ein.