public class OpenFileWebChromeClient extends WebChromeClient {
    public static final int REQUEST_FILE_PICKER = 1;
    public ValueCallback<Uri> mFilePathCallback;
    public ValueCallback<Uri[]> mFilePathCallbacks;
Activity mContext;
    public OpenFileWebChromeClient(Activity mContext){
        super
 
();
        this.mContext = mContext;
}
    // Android < 3.0 呼叫這個方法
public void openFileChooser(ValueCallback<Uri> filePathCallback) {
        mFilePathCallback = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*"
 
);
mContext.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
REQUEST_FILE_PICKER);
}
    // 3.0 + 呼叫這個方法
public void openFileChooser(ValueCallback filePathCallback,
String acceptType) {
        mFilePathCallback = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT
 
);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
mContext.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
REQUEST_FILE_PICKER);
}
    //  / js上傳檔案的<input type="file" name="fileField" id="fileField" />事件捕獲
    // Android > 4.1.1 呼叫這個方法
public void openFileChooser(ValueCallback<Uri> filePathCallback,
String acceptType, String capture) {
        mFilePathCallback = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
mContext.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
REQUEST_FILE_PICKER);
}

    @Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback,
WebChromeClient.FileChooserParams fileChooserParams) {
        mFilePathCallbacks = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
mContext.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
REQUEST_FILE_PICKER);
        return true;
}
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == OpenFileWebChromeClient.REQUEST_FILE_PICKER) {
        if (mOpenFileWebChromeClient.mFilePathCallback != null) {
            Uri result = data == null || resultCode != Activity.RESULT_OK ? null
: data.getData();
            if (result != null) {
                String path = MediaUtility.getPath(getApplicationContext(),
result);
Uri uri = Uri.fromFile(new File(path));
mOpenFileWebChromeClient.mFilePathCallback
                        .onReceiveValue(uri);
} else {
                mOpenFileWebChromeClient.mFilePathCallback
                        .onReceiveValue(null);
}
        }
        if (mOpenFileWebChromeClient.mFilePathCallbacks != null) {
            Uri result = data == null || resultCode != Activity.RESULT_OK ? null
: data.getData();
            if (result != null) {
                String path = MediaUtility.getPath(getApplicationContext(),
result);
Uri uri = Uri.fromFile(new File(path));
mOpenFileWebChromeClient.mFilePathCallbacks
                        .onReceiveValue(new Uri[]{uri});
} else {
                mOpenFileWebChromeClient.mFilePathCallbacks
                        .onReceiveValue(null);
}
        }

        mOpenFileWebChromeClient.mFilePathCallback = null;
mOpenFileWebChromeClient.mFilePathCallbacks = null;
}
}