亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

當(dāng)我在寫(xiě)一個(gè)android應(yīng)用的時(shí)候遇到了這樣一個(gè)需求：

有個(gè)ListView，里面的item都有圖片和文字，當(dāng)一個(gè)item被點(diǎn)擊的時(shí)候顯示在此item上顯示圖片和一個(gè)進(jìn)度條，當(dāng)另一個(gè)item被點(diǎn)擊的時(shí)候隱藏上一次被電擊item的圖片和進(jìn)度條，顯示當(dāng)前被點(diǎn)擊item的圖片和進(jìn)度條

我的有關(guān)代碼是這樣的，用的是simpleAdapter

我的思路是就這樣的，先把ListView的所有item遍歷，隱藏我該隱藏的控件，然后顯示當(dāng)前被點(diǎn)擊item的要顯示的控件（progressbar和playing_effect）

不過(guò)問(wèn)題出現(xiàn)了，點(diǎn)擊之后的效果特別卡，不知道怎么回事點(diǎn)擊40-50次之后就出現(xiàn)手機(jī)內(nèi)存不足的情況，難道我的思路一開(kāi)始是錯(cuò)誤的嗎？還是需要優(yōu)化？耗內(nèi)存是怎么回事啊

謝謝

public class MainActivity extends AppCompatActivity {



    ArrayList<Boolean> itemState = new ArrayList<>();
    int checkedItemIndex = -1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        for (int s=0;s<20;s++){
            itemState.add(false);
        }


        class AudioListAdapter extends SimpleAdapter{

            public AudioListAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) {
                super(context, data, resource, from, to);
            }
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View v = super.getView(position, convertView, parent);
                //
                if (itemState.get(position)){
                    // 設(shè)置點(diǎn)擊狀態(tài)
                    v.findViewById(R.id.progressBar).setVisibility(View.VISIBLE);
                    v.findViewById(R.id.playing_effect).setVisibility(View.VISIBLE);
                }else {
                    // 設(shè)置未點(diǎn)擊狀態(tài)
                    v.findViewById(R.id.progressBar).setVisibility(View.GONE);
                    v.findViewById(R.id.playing_effect).setVisibility(View.GONE);
                }
                //

                return v;
            }
        }



        final ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
        for (int i = 0; i < 10; i++){
            HashMap<String,Object> map = new HashMap<String, Object>();
            map.put("song","song name "+i);
            map.put("singer","singer "+i);
            map.put("currentTime","01:3"+i);
            map.put("allTime","04:5"+i);

            listItem.add(map);
        }

        final ListView listView = (ListView)findViewById(R.id.listView);
        final AudioListAdapter audioListAdapter = new AudioListAdapter(
                this,
                listItem,
                R.layout.item,
                new String[]{"song","singer","currentTime","allTime"},
                new int[]{R.id.song,R.id.singer,R.id.currentTime,R.id.allTime}
        );

        listView.setAdapter(audioListAdapter);

        // onclick
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                //
                if (checkedItemIndex>=0){
                    itemState.set(checkedItemIndex,false);
                }
                checkedItemIndex = position;
                itemState.set(position,true);
                audioListAdapter.notifyDataSetChanged();
                //
            }
        });

    }

    @Override
    public void onStart(){
        super.onStart();
    }

}

上面我把所有代碼給貼出來(lái)的，我按樓下回復(fù)里的想法去做的，我發(fā)現(xiàn)結(jié)果同樣很卡，內(nèi)存耗得更快，大神們看一下吧

謝謝