Androidどのように設定するViewのデフォルトの背景色

Question

私はAndroidが初めてで、ヘルプが必要です。

animeList.setBackgroundColor(Color.BLUE); 

なぜレイアウトの背景に影響しませんか？クリックイベントのイベントは正常に機能します。私はTextViewを試したが、何も変わっていない。ありがとう...

package com.animeworld.tenshi; 

import android.app.Activity; 
import android.graphics.Color; 
import android.media.Image; 
import android.os.Bundle; 
import android.view.Gravity; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

import java.util.ArrayList; 

public class AnimeCategoryActivity extends Activity { 

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

     ArrayList<Anime> animes = new ArrayList<>(); 
     Anime[] listOfAnime = Anime.animes; 
     for(Anime loa : listOfAnime) { 
      animes.add(loa); 
     } 
     LinearLayout mainLayout = (LinearLayout) findViewById(R.id.activity_anime_category); 
     for(Anime anime : animes) { 
      final LinearLayout animeList = new LinearLayout(this); 
      LinearLayout.LayoutParams animeListLayout = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 
        LinearLayout.LayoutParams.MATCH_PARENT); 
      animeListLayout.setMargins(0, 0, 0, 5); 
      animeList.setLayoutParams(animeListLayout); 
      animeList.setBackgroundColor(Color.BLUE); 
      animeList.setOnTouchListener(new View.OnTouchListener() { 
       @Override 
       public boolean onTouch(View v, MotionEvent event) { 
        switch(event.getAction()) 
        { 
         case MotionEvent.ACTION_DOWN: 
          animeList.setBackgroundColor(Color.parseColor("#7CCAFA")); 
          break; 
         case MotionEvent.ACTION_UP: 
          animeList.setBackgroundColor(Color.WHITE); 
          break; 
        } 
        return true; 
       } 
      }); 

      ImageView animeListImg = new ImageView(this); 
      LinearLayout.LayoutParams animeListImgLayout = new LinearLayout.LayoutParams(200, 300); 
      animeListImgLayout.setMargins(0, 0, 5, 0); 
      animeListImg.setLayoutParams(animeListImgLayout); 

      TextView animeListDesc = new TextView(this); 
      LinearLayout.LayoutParams animeListDescLayout = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 
        LinearLayout.LayoutParams.MATCH_PARENT); 
      animeListDesc.setLayoutParams(animeListDescLayout); 
      animeListDesc.setTextColor(Color.BLUE); 
      animeListDesc.setGravity(Gravity.CENTER); 
      animeListDesc.setTextSize(18); 

      animeList.addView(animeListImg); 
      animeList.addView(animeListDesc); 
      animeListImg.setImageResource(anime.getImageResourceId()); 
      animeListDesc.setText(anime.getName()); 
      mainLayout.addView(animeList); 
     } 
    } 
} 

Answer 1

"mainLayout"コンテナ内にレイアウトを動的に追加しています。したがって、親ビュー/コンテナビューに背景色を設定する必要があります。