webview打开图库并获取安卓文件图片

来源：互联网发布：建立网络英文怎么写编辑：程序博客网时间：2024/06/04 19:11

1，实现安卓webview 打开安卓图库并拿到文件，最后调用js实现文件上传（未实现）。

2，

demo81.htm

网页代码如下：一个简单的文件选择按钮。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"        "http://www.w3.org/TR/html4/loose.dtd"><html><body>        <input id="fileImage" type="file" size="300" name="fileselect" accept="image/*" /></body></html>

3，安卓实现代码

package cai.com.myapplication;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Build;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.webkit.ValueCallback;import android.webkit.WebChromeClient;import android.webkit.WebView;public class WebViewDemo extends FragmentActivity {    private static final int FILE_SELECT_CODE = 0;    private WebView webView;    private ValueCallback<Uri> mUploadMessage;//回调图片选择，4.4以下    private ValueCallback<Uri[]> mUploadCallbackAboveL;//回调图片选择，5.0以上    @Override    protected void onCreate(Bundle arg0) {        super.onCreate(arg0);        setContentView(R.layout.content_main);        initWebView();    }    @SuppressLint("SetJavaScriptEnabled")    private void initWebView() {        webView = (WebView) findViewById(R.id.webview);        WebView webView = (WebView) findViewById(R.id.webview);        //允许JavaScript执行        webView.getSettings().setJavaScriptEnabled(true);        webView.getSettings().setLoadsImagesAutomatically(true);        webView.setVerticalScrollBarEnabled(false);        //运行webview通过URI获取安卓文件        webView.getSettings().setAllowFileAccess(true);        webView.getSettings().setAllowFileAccessFromFileURLs(true);        webView.getSettings().setAllowUniversalAccessFromFileURLs(true);        webView.setWebChromeClient(new MyWebChromeClient());//设置可以打开图片管理器        webView.loadUrl("file:///android_asset/demo81.htm");    }    private class MyWebChromeClient extends WebChromeClient {        // For Android 3.0+        public void openFileChooser(ValueCallback<Uri> uploadMsg) {            mUploadMessage = uploadMsg;            Intent i = new Intent(Intent.ACTION_GET_CONTENT);            i.addCategory(Intent.CATEGORY_OPENABLE);            i.setType("image/*");            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILE_SELECT_CODE);        }        // For Android 3.0+        public void openFileChooser(ValueCallback uploadMsg, String acceptType) {            mUploadMessage = uploadMsg;            Intent i = new Intent(Intent.ACTION_GET_CONTENT);            i.addCategory(Intent.CATEGORY_OPENABLE);            i.setType("*/*");            startActivityForResult(Intent.createChooser(i, "File Browser"), FILE_SELECT_CODE);        }        // For Android 4.1        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {            mUploadMessage = uploadMsg;            Intent i = new Intent(Intent.ACTION_GET_CONTENT);            i.addCategory(Intent.CATEGORY_OPENABLE);            i.setType("image/*");            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILE_SELECT_CODE);        }        // For Android 5.0+        public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {            mUploadCallbackAboveL = filePathCallback;            Intent i = new Intent(Intent.ACTION_GET_CONTENT);            i.addCategory(Intent.CATEGORY_OPENABLE);            i.setType("*/*");            startActivityForResult(                    Intent.createChooser(i, "File Browser"),                    FILE_SELECT_CODE);            return true;        }    }    @Override    public void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode != Activity.RESULT_OK) {            return;        }        switch (requestCode) {            case FILE_SELECT_CODE: {                if (Build.VERSION.SDK_INT >= 21) {//5.0以上版本处理                    Uri uri = data.getData();                    Uri[] uris = new Uri[]{uri};                   /* ClipData clipData = data.getClipData();  //选择多张                    if (clipData != null) {                        for (int i = 0; i < clipData.getItemCount(); i++) {                            ClipData.Item item = clipData.getItemAt(i);                            Uri uri = item.getUri();                            uris[i]=uri;                        }                    }*/                    mUploadCallbackAboveL.onReceiveValue(uris);//回调给js                } else {//4.4以下处理                    Uri uri = data.getData();                    mUploadMessage.onReceiveValue(uri);                }            }            break;        }    }}

运行后

选择图片后。

最后就是使用Js实现文件上传到服务器。

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