Question

Logcat消息：

> 11-27 05:33:47.706: E/AndroidRuntime(2417): FATAL EXCEPTION: main
11-27 05:33:47.706: E/AndroidRuntime(2417): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.calculator/com.example.calculator.MainActivity}: java.lang.UnsupportedOperationException: addView(View) is not supported in AdapterView
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.os.Looper.loop(Looper.java:137)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at java.lang.reflect.Method.invokeNative(Native Method)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at java.lang.reflect.Method.invoke(Method.java:525)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at dalvik.system.NativeStart.main(Native Method)
11-27 05:33:47.706: E/AndroidRuntime(2417): Caused by: java.lang.UnsupportedOperationException: addView(View) is not supported in AdapterView
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.widget.AdapterView.addView(AdapterView.java:451)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at com.example.calculator.MainActivity.onCreate(MainActivity.java:46)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.Activity.performCreate(Activity.java:5133)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-27 05:33:47.706: E/AndroidRuntime(2417):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-27 05:33:47.706: E/AndroidRuntime(2417):     ... 11 more

代码：
`super.onCreate（savedInstanceState）;

    setContentView(R.layout.activity_main);

    gv = (GridView)findViewById(R.id.keys);
    Button b = new Button(this);
    b.setText("1");
    gv.addView(b);`

我在gv.addView(b)

中收到了不受支持的例外情况

XML的文件：enter code here

android:useDefaultMargins="true"
android:alignmentMode="alignBounds"
android:columnOrderPreserved="false"   

android:columnCount="1"
android:rowCount="3"

tools:context=".MainActivity" >

<EditText
    android:id="@+id/resBox"
    android:layout_width="match_parent"
    android:layout_height="120dp"
    android:layout_gravity="left"
    android:background="@color/grey"
    android:textColor="@color/black"
    android:hint="@string/nothing"
    android:gravity="right" />

<EditText
    android:id="@+id/calBox"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:layout_column="0"
    android:layout_gravity="left"
    android:background="@color/darkGrey"
    android:ems="10"
    android:gravity="right"
    android:textColor="@color/white"
    android:hint="@string/zero" />

<GridView
    android:id="@+id/keys"
    android:layout_width="match_parent"
    android:layout_height="232dp"
    android:layout_column="0"
    android:layout_gravity="center_horizontal|bottom"
    android:layout_row="2"
    android:numColumns="4" 
    android:verticalSpacing="2dp"
    android:horizontalSpacing="2dp"
    android:clipChildren="true" />

`

Answer 1

要向GridView添加视图，您需要创建适配器并使用它。有关更多详细信息，请参阅以下示例：

http://www.mkyong.com/android/android-gridview-example/

Answer 2

GridVIew与列表视图非常相似，我们不能通过调用addView（）向其添加任何项目，在初始API之后它不受支持。相反，我们应该定义一个适配器并将gridview设置为它

＆＃34; void addView（查看子项）不支持此方法，并在调用时抛出UnsupportedOperationException。＆＃34;

http://developer.android.com/reference/android/widget/ListView.html

以编程方式向GridView添加Button - 获取UnsupportedOperationException？

2 个答案: