有效地加載繪圖板不使用太多的內存

在我的應用程序中，我有一個滾動菜單，我使用這個功能來完整的菜單項。但是大部分時間我都會出現內存不足的錯誤。我的模擬器中沒有出現錯誤。但是我的設備一直失敗。我試過有效地加載繪圖板不使用太多的內存

android:hardwareAccelerated="false" 
    android:largeHeap="true"

也減小了圖像的大小。但設備說它需要太多的內存。我希望我的應用程序能夠更快速地加載和高效存儲。我仍然是Android的首發。我看到一些關於高效加載圖像的文章。但我不明白。任何人都可以幫我一些示例代碼？

public void RefreshMenuItems(int category) { 
    //Create menu scroller 
    LinearLayout.LayoutParams card_lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT); 
    card_lp.setMargins(dp(5), 0, dp(5), 0); 

    LinearLayout.LayoutParams image_lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, 0); 
    image_lp.setMargins(dp(40), dp(5), dp(40), dp(5)); 
    image_lp.weight = 0.5f; 

    LinearLayout.LayoutParams desc_lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0); 
    desc_lp.weight = 0.32f; 

    LinearLayout.LayoutParams title_lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0); 
    title_lp.weight = 0.08f; 

    RelativeLayout.LayoutParams price_rp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 
    price_rp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); 

    RelativeLayout.LayoutParams buy_rp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 
    buy_rp.addRule(RelativeLayout.ALIGN_PARENT_LEFT); 

    LinearLayout.LayoutParams bottom_lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0); 
    bottom_lp.weight = 0.1f; 

    //fill menu 
    for (int i = 0; i < item_title.length; i++) { 
     final int currenti = i; 

     if ((item_category[i] == category) || category == 0) { 
      TextView title = new TextView(this); 
      title.setText(item_title[currenti]); 
      title.setGravity(Gravity.CENTER); 
      title.setTextColor(0xff212121); 
      title.setPadding(dp(10), dp(0), dp(10), dp(0)); 
      title.setTypeface(null, Typeface.BOLD); 
      title.setLayoutParams(title_lp); 
      title.setBackgroundResource(R.drawable.borderradius2); 
      title.setTextSize(fontpercent_screenheight(2.5)); 

      ImageView item = new ImageView(this); 
      item.setImageResource(getResources().getIdentifier(item_image[i], "drawable", getPackageName())); 
      item.setScaleType(ScaleType.FIT_CENTER); 
      item.setAdjustViewBounds(true); 
      item.setLayoutParams(image_lp); 

      TextView desc = new TextView(this); 
      desc.setText(item_shortdesc[currenti]); 
      desc.setPadding(dp(10), dp(5), dp(10), dp(5)); 
      desc.setLayoutParams(desc_lp); 
      desc.setTextSize(fontpercent_screenheight(2.5)); 

      TextView price = new TextView(this); 
      price.setText(String.format(sign + "%.2f", Double.parseDouble(item_price[currenti]))); 
      price.setPadding(0, dp(5), dp(10), dp(5)); 
      price.setLayoutParams(price_rp); 
      price.setTextSize(fontpercent_screenheight(2.5)); 

      buy = new TextView(this); 
      buy.setText(R.string.MenuAddToOrderButton); 
      buy.setPadding(dp(10), dp(5), 0, dp(5)); 
      buy.setTextColor(0xffff0000); 
      buy.setLayoutParams(buy_rp); 
      buy.setTextSize(fontpercent_screenheight(2.5)); 
      buy.setClickable(true); 
      buy.setOnClickListener(new OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        addItemToOrder(currenti); 
       } 
      }); 
      buy.setOnTouchListener(new OnTouchListener() { 
       @Override 
       public boolean onTouch(View v, MotionEvent event) { 
        if (event.getAction() == MotionEvent.ACTION_DOWN) { 
         ((TextView) v).setTextColor(0xff212121); 
        } else if (event.getAction() == MotionEvent.ACTION_UP) { 
         ((TextView) v).setTextColor(0xffff0000); 
        } 
        return false; 
       } 
      }); 

      RelativeLayout bottom = new RelativeLayout(this); 
      bottom.setLayoutParams(bottom_lp); 
      bottom.addView(buy); 
      bottom.addView(price); 

      LinearLayout card = new LinearLayout(this); 
      card.setOrientation(LinearLayout.VERTICAL); 
      card.setLayoutParams(card_lp); 
      card.setBackgroundResource(R.drawable.borderradius1); 
      card.setWeightSum(1f); 
      card.setOnClickListener(new OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Intent intent = new Intent(context, ItemProfile.class).putExtra("item_image", getResources().getIdentifier(item_image[currenti], "drawable", getPackageName())).putExtra("item_title", item_title[currenti]).putExtra("item_desc", item_desc[currenti]).putExtra("item_price", Double.parseDouble(item_price[currenti])); 
        startActivity(intent); 
       } 
      }); 

      card.addView(title); 
      card.addView(item); 
      card.addView(desc); 
      card.addView(bottom); 

      menu.addView(card); 
     } 
    } 
}

來源

2016-07-17 Adney Austen

請參閱下面的答案。 –

任何時候我開始看到循環遍歷創建視圖的代碼，我通常擔心事情沒有以最佳方式完成。再看看https://developer.android.com/guide/topics/ui/declaring-layout.html。您可能想要查看ListView，看起來您正在嘗試手動構建一個ListView。

來源

2016-07-17 00:20:32

我沒有得到你。 –

它看起來像你正試圖建立一個菜單，其中包含菜單項的列表。通過自己創建視圖，幾乎不會在android中創建列表。您應該使用ListView和適配器。 –

但我怎麼能改變這個適配器？ –

有效地加載繪圖板不使用太多的內存

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