为什么我的GridView不工作？

Question

public class MainActivity extends AppCompatActivity {
private GridView turtle;
private List<Map<String,Object>> datalist;
private int[] icon = {R.drawable.address_book,R.drawable.calendar,R.drawable.camera,R.drawable.clock,R.drawable.games_control,R.drawable.messenger,R.drawable.ringtone,R.drawable.settings,R.drawable.speech_balloon,R.drawable.weather,R.drawable.world,R.drawable.youtube};
private String  [] iconName = {"Contackt","Calendar","Camera","Clock","game","messager","ring","setting","voice","weather","browser","video"};
private SimpleAdapter adapter;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    turtle = (GridView) findViewById(R.id.turtle);
    datalist = new ArrayList<Map<String,Object>>();
    adapter = new SimpleAdapter(this,getdata(),R.layout.item,new String[]{"pic","txt"}, new int[]{R.id.pic,R.id.text});
    turtle.setAdapter(adapter);
}
private  List<Map<String,Object>> getdata(){
    for(int i = 0; i<icon.length;i++) {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("pic", icon[i]);
        map.put("text",iconName[i]);
        datalist.add(map);


    }


    return datalist;
}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.jinyu.gridleview.MainActivity">

<GridView
    android:numColumns="3"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/turtle"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:gravity="center"
>
<ImageView
    android:src="@drawable/ic_launcher"
    android:id="@+id/pic"
    android:layout_width="60dp"
    android:layout_height="60dp" />
<TextView
    android:layout_marginTop="5dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:id="@+id/text"
    android:text="text"
    android:textSize="12dp"/>


</LinearLayout>

Answer 1

不能动态增加堆大小，但可以通过使用请求使用更多。

android:largeHeap="true"

在manifest.xml中。

https://stackoverflow.com/A/25719828/4853552