Question

我试图通过网络视图上传文件，但目前没有发生，我正在查看this famous answer，这是我的

MainActivity.java

package ...;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

    private ValueCallback<Uri> mUploadMessage;
    private final static int FILECHOOSER_RESULTCODE = 1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        WebView wv = (WebView) findViewById(R.id.webView);
        wv.getSettings().setJavaScriptEnabled(true);
        wv.setWebViewClient(new WebViewClient());
        wv.setWebChromeClient(new WebChromeClient() {
            //The undocumented magic method override
            //Eclipse will swear at you if you try to put @Override here
            public void openFileChooser(ValueCallback<Uri> uploadMsg) {
                MainActivity.this.showAttachmentDialog(uploadMsg);
            }

            // For Android > 3.x
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
                MainActivity.this.showAttachmentDialog(uploadMsg);
            }

            // For Android > 4.1
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
                MainActivity.this.showAttachmentDialog(uploadMsg);
            }
        });

        wv.loadUrl("http://www.tizag.com/phpT/fileupload.php");

    }

    private void showAttachmentDialog(ValueCallback<Uri> uploadMsg) {
        this.mUploadMessage = uploadMsg;

        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("*/*");

        this.startActivityForResult(Intent.createChooser(i, "Choose type of attachment"), FILECHOOSER_RESULTCODE);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (requestCode == FILECHOOSER_RESULTCODE) {
            if (null == this.mUploadMessage) {
                return;
            }
            Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
            this.mUploadMessage.onReceiveValue(result);
            this.mUploadMessage = null;
        }
    }
}

activity_main.xml中

<?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"
    tools:context="....MainActivity">

    <WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/webView"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />
</RelativeLayout>

和权限

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />


</manifest>

如果您设置这三个文件并运行它，我已将webview网址设置为包含文件输入的页面，您将看到它无效。我使用的是API版本19 +

我很快就会哭。

Answer 1

所以我遇到了我认为有帮助的GIT回购 - https://github.com/GoogleChrome/chromium-webview-samples

查看“input-file-example”。

我遇到了Build.Gradle的问题，并在此找到了解决方案 - Gradle DSL method not found: 'runProguard'

希望这有帮助！

Web视图中的文件上载无效

1 个答案: