Android端图片选择器下滑关闭功能如何禁用？

我开发的Android应用包含文件和图片选择功能：打开文件选择窗口时不会因滑动关闭，但打开图片选择窗口时可通过下滑操作将其最小化或关闭，这给用户带来了困扰。请问是否可以禁用该功能？

相关代码： #

WebChromeClient 实现：

webAppView.setWebChromeClient(new WebChromeClient() {
    public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
        callback.invoke(origin, true, false);
    }
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
        mUploadMessage = uploadMsg;
        String[] types = {acceptType};
        openImageChooser(types);
    }

    // For Lollipop 5.0+ Devices
    public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
        mUploadMessages = filePathCallback;
        openImageChooser(fileChooserParams.getAcceptTypes());
        return true;
    }

    // openFileChooser for other Android versions
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
        openFileChooser(uploadMsg, acceptType);
    }

    private void openImageChooser(String[] types_array) {
        try {
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);

            i.setType("*/*");
            i.putExtra(Intent.EXTRA_MIME_TYPES, types_array);

            i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
            Intent chooserIntent = Intent.createChooser(i, "Files Chooser");

            startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void onProgressChanged(WebView view, int progress) {
        if (progress == 100) {
            preload_img.setVisibility(View.INVISIBLE);
        }
    }
});

onActivityResult 实现：

@Override
public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Uri[] results = null;
    try {
        if (resultCode != RESULT_OK) {
            results = null;
        } else {
            if (data != null) {
                String dataString = data.getDataString();
                ClipData clipData = data.getClipData();
                if (clipData != null) {
                    results = new Uri[clipData.getItemCount()];
                    for (int i = 0; i < clipData.getItemCount(); i++) {
                        ClipData.Item item = clipData.getItemAt(i);
                        results[i] = item.getUri();
                    }
                }
                if (dataString != null) {
                    results = new Uri[]{Uri.parse(dataString)};
                }
            } else {
                results = new Uri[]{mCapturedImageURI};
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    mUploadMessages.onReceiveValue(results);
    mUploadMessages = null;
}

Manifest 文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyDudes"
        android:usesCleartextTraffic="true"
        android:requestLegacyExternalStorage="true"
        tools:targetApi="31">
        <activity
            android:name="ru.my_dudes.mydudesapp.MainActivity"
            android:exported="true"
            android:screenOrientation="portrait"
            android:launchMode="singleTop">
            <tools:validation testUrl="https://myapp.app/" />

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter android:autoVerify="true">
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data android:scheme="https" />
                <data android:host="myapp.app" />
            </intent-filter>
        </activity>

        <service
            android:name="ru.my_dudes.mydudesapp.ForegroundGpsService"
            android:enabled="true"
            android:exported="false"
            android:foregroundServiceType="location"
            android:stopWithTask="false"></service>
        <uses-library
            android:name="org.apache.http.legacy"
            android:required="false" />
    </application>

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_LOCATION"/>
    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
</manifest>

这个问题的核心是系统默认图片选择器支持手势下滑关闭/最小化，而文件选择器不支持。由于你通过Intent.ACTION_GET_CONTENT唤起系统选择器，直接禁用系统选择器的手势没有公开API支持，但可以通过以下两种方式解决：

方式一：强制唤起文件选择器（适配部分系统） #

如果允许统一用文件选择器处理图片选择，可以修改openImageChooser方法，添加额外参数引导系统唤起文件选择器而非媒体选择器：

private void openImageChooser(String[] types_array) {
    try {
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);

        i.setType("*/*");
        i.putExtra(Intent.EXTRA_MIME_TYPES, types_array);

        // 部分系统会根据此参数优先唤起文件选择器
        i.putExtra("android.content.extra.SHOW_ADVANCED", true);

        i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
        Intent chooserIntent = Intent.createChooser(i, "Files Chooser");

        startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

注意：该方法依赖系统厂商实现，部分定制ROM可能不生效。

方式二：集成自定义选择器（最优解） #

最可靠的方案是使用第三方自定义文件/图片选择器（如Matisse、PictureSelector），完全替代系统选择器，从而完全控制界面交互逻辑，包括禁用下滑关闭手势。

示例（以Matisse为例）： #

1. 添加依赖到app/build.gradle：

implementation 'com.zhihu.android:matisse:0.5.3-beta4'

2. 修改openImageChooser方法：

private void openImageChooser(String[] types_array) {
    List<MimeType> mimeTypes = new ArrayList<>();
    for (String type : types_array) {
        if (type.startsWith("image/")) {
            mimeTypes.add(MimeType.ofImage());
        } else {
            mimeTypes.add(MimeType.ofFile());
        }
    }

    Matisse.from(MainActivity.this)
            .choose(mimeTypes)
            .countable(true)
            .maxSelectable(9)
            .restrictOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT)
            .thumbnailScale(0.85f)
            .imageEngine(new Glide4Engine()) // 需实现ImageEngine接口，可参考Matisse官方示例
            .forResult(FILECHOOSER_RESULTCODE);
}

3. 适配onActivityResult处理返回结果：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == FILECHOOSER_RESULTCODE && resultCode == RESULT_OK) {
        List<Uri> uris = Matisse.obtainResult(data);
        Uri[] results = uris.toArray(new Uri[0]);
        if (mUploadMessages != null) {
            mUploadMessages.onReceiveValue(results);
            mUploadMessages = null;
        } else if (mUploadMessage != null) {
            mUploadMessage.onReceiveValue(uris.isEmpty() ? null : uris.get(0));
            mUploadMessage = null;
        }
    } else {
        // 处理取消选择的情况
        if (mUploadMessages != null) {
            mUploadMessages.onReceiveValue(null);
            mUploadMessages = null;
        }
        if (mUploadMessage != null) {
            mUploadMessage.onReceiveValue(null);
            mUploadMessage = null;
        }
    }
}

该方案完全可控，不受系统选择器的交互限制，是长期稳定的解决方案。

补充说明 #

系统选择器的下滑关闭手势是Android 11+部分系统引入的特性，属于系统层面交互，无公开API可直接禁用，因此自定义选择器是最优解。

内容的提问来源于stack exchange，提问作者OT_VINTA