使用自定义上下文操作栏进行WebView文本选择

有一个更容易的方式!请参阅以下更新:D

我根据这个答案遵循了这个建议,稍加调整以更接近地匹配被覆盖的代码:

public class MyWebView extends WebView {

    private ActionMode mActionMode;
    private mActionMode.Callback mActionModeCallback;

    @Override
    public ActionMode startActionMode(Callback callback) {
        ViewParent parent = getParent();
        if (parent == null) {
            return null;
        }
        mActionModeCallback = new CustomActionModeCallback();
        return parent.startActionModeForChild(this, mActionModeCallback);
    }
}

从本质上讲,这会强制您的自定义CAB显示而不是Android CAB.现在你必须修改你的回调,以便文本高亮显示将与CAB一起消失:

public class MyWebView extends WebView {
    ...
    private class CustomActionModeCallback implements ActionMode.Callback {
        ...
        // Everything up to this point is the same as in the question

        // Called when the user exits the action mode
        @Override
        public void onDestroyActionMode(ActionMode mode) {
            clearFocus(); // This is the new code to remove the text highlight
             mActionMode = null;
        }
    }
}

这里的所有都是它的.请注意,只要您使用MyWebView被覆盖的内容startActionMode,就无法获得本机CAB(复制/粘贴菜单,如果是WebView).有可能实现这种行为,但这不是这段代码的工作方式.

该解决方案提供的控制较少ActionMode,但它需要的代码远少于上述解决方案.

public class MyActivity extends Activity {

    private ActionMode mActionMode = null;

    @Override
    public void onActionModeStarted(ActionMode mode) {
        if (mActionMode == null) {
            mActionMode = mode;
            Menu menu = mode.getMenu();
            // Remove the default menu items (select all, copy, paste, search)
            menu.clear();

            // If you want to keep any of the defaults,
            // remove the items you don't want individually:
            // menu.removeItem(android.R.id.[id_of_item_to_remove])

            // Inflate your own menu items
            mode.getMenuInflater().inflate(R.menu.my_custom_menu, menu);
        }

        super.onActionModeStarted(mode);
    }

    // This method is what you should set as your item's onClick
    // <item android:onClick="onContextualMenuItemClicked" />
    public void onContextualMenuItemClicked(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.example_item_1:
                // do some stuff
                break;
            case R.id.example_item_2:
                // do some different stuff
                break;
            default:
                // ...
                break;
        }

        // This will likely always be true, but check it anyway, just in case
        if (mActionMode != null) {
            mActionMode.finish();
        }
    }

    @Override
    public void onActionModeFinished(ActionMode mode) {
        mActionMode = null;
        super.onActionModeFinished(mode);
    }
}

这是一个示例菜单,可以帮助您入门:

<!-- my_custom_menu.xml -->
<?xml version="1.0" encoding="utf-8"?>

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/example_item_1"
        android:icon="@drawable/ic_menu_example_1"
        android:showAsAction="always"
        android:onClick="onContextualMenuItemClicked"
        android:title="@string/example_1">
    </item>

    <item
        android:id="@+id/example_item_2"
        android:icon="@drawable/ic_menu_example_2"
        android:showAsAction="ifRoom"
        android:onClick="onContextualMenuItemClicked"
        android:title="@string/example_2">
    </item>

</menu>

而已!你完成了!现在您的自定义菜单将显示,您不必担心选择,您几乎不必关心ActionMode生命周期.

这几乎完美无缺地WebView占据了整个父母Activity.如果View你Activity的同时有多个s,我不确定它会有多好用.在这种情况下,可能需要进行一些调整.