Android Html进行文件上传实践

没知识点 纯操作 交互直接使用

一、权限和变量说明

manifest说明--网络权限 
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
 
// 引用实例说明
private static final int FILE_CHOOSER_RESULT_CODE = 2000; // 响应码
private ValueCallback<Uri> uploadMessage; // android 3.0- 上传回调类
private ValueCallback<Uri[]> uploadMessageAboveL; // android 3.0+ 上传回调类
 
// settings基本设置(必选)
WebSettings webSettings = webview.getSettings();
// 其余setting根据自身设置 以下是必要的
webSettings.setJavaScriptEnabled(true);
webSettings.setUserAgentString("User-Agent:Android");
webview.setWebViewClient(new WebViewClient()); // 防止跳转到本地浏览器

二、设置文件上传setting

webview.setWebChromeClient(new WebChromeClient() {
    @Override
    public void onReceivedTitle(WebView view, String title) {
        super.onReceivedTitle(view, title);
        // 获取H5标题
    }
 
    @Override
    public void onProgressChanged(WebView view, int newProgress) {
 
  //TODO 可以在这里添加UI
        if (newProgress == 100) {
 
 
        } else {
 
 
        }
        super.onProgressChanged(view, newProgress);
    }
 
    //For Android API < 11 (3.0 OS)
    public void openFileChooser(ValueCallback<Uri> valueCallback) {
        uploadMessage = valueCallback;
        openFileChooserActivity();
    }
 
    //For Android API >= 11 (3.0 OS)
    public void openFileChooser(ValueCallback<Uri> valueCallback, String acceptType, String capture) {
        uploadMessage = valueCallback;
        openFileChooserActivity();
    }
 
    //For Android API >= 21 (5.0 OS)
    @Override
    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
        //TODO 可以在这里添加判断 如果没有读取存储权限 就不给进 如果有就进入
        uploadMessageAboveL = filePathCallback;
        openFileChooserActivity();
        return true;
    }
 
});

三、打开本机文件内容并选择

/**
 * 打开文件选择列表
 */
private void openFileChooserActivity() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*"); // 所有文件
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    startActivityForResult( Intent.createChooser(intent, "Select a File to Upload"), FILE_CHOOSER_RESULT_CODE); // 响应码
}

四、获取本地文件并上传

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == FILE_CHOOSER_RESULT_CODE) {
        if (null == uploadMessage && null == uploadMessageAboveL) return;
        Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
        if (uploadMessageAboveL != null) { // > android 3.0
            onActivityResultAboveL(requestCode, resultCode, data);
        } else if (uploadMessage != null) {// < android 3.0
            uploadMessage.onReceiveValue(result);
            uploadMessage = null;
        }
    }
}
 
**
 * 5.0以上解析文件并回调上传
 * @param requestCode
 * @param resultCode
 * @param intent
 */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void onActivityResultAboveL(int requestCode, int resultCode, Intent intent) {
    if (requestCode != FILE_CHOOSER_RESULT_CODE || uploadMessageAboveL == null)
        return;
    Uri[] results = null;
    if (resultCode == Activity.RESULT_OK) {
        if (intent != null) {
            String dataString = intent.getDataString();
            // 多选 暂未调用
            ClipData clipData = intent.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)};
            }
        }
    }
    //回调上传 并置空
    uploadMessageAboveL.onReceiveValue(results);
    uploadMessageAboveL = null;
}