Android WebView调用本地相册

长话短说，我们Android手机通过WebView打开H5页面。如果网页需要打开手机相册选取图片，不做任何处理的话是不可以选取的。我们需要重写WebChromeClient类的部分方法

第一步，重写方法（WebChromeClient类中的）

几个变量：

private ValueCallback<Uri>  mUploadMessage;
private ValueCallback<Uri[]>  mUploadCallbackAboveL;
private final static int FILECHOOSER_RESULTCODE = 123456;

1、Android5.0之前

public void openFileChooser(ValueCallback<Uri  uploadMsg) {
  mUploadMessage = uploadMsg;
  Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  i.addCategory(Intent.CATEGORY_OPENABLE);
  i.setType("image/*");
  Html5Activity.this.startActivityForResult(Intent.createChooser(i, "File Chooser"),
      FILECHOOSER_RESULTCODE);
}

public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
  mUploadMessage = uploadMsg;
  Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  i.addCategory(Intent.CATEGORY_OPENABLE);
  i.setType("image/*");
  Html5Activity.this.startActivityForResult(
      Intent.createChooser(i, "File Browser"),
      FILECHOOSER_RESULTCODE);
}

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/*");
  Html5Activity.this.startActivityForResult(Intent.createChooser(i, "File Browser"),
      FILECHOOSER_RESULTCODE);
}

注意：这三种方法名是一样的，只是在不同版本下会分别调用
还有就是这个方法是重写这个WebChromeClient类里面的

2、Android5.0之后

@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]  filePathCallback, FileChooserParams fileChooserParams) {
  mUploadCallbackAboveL = filePathCallback;
  Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  i.addCategory(Intent.CATEGORY_OPENABLE);
  i.setType("image/*");
  Html5Activity.this.startActivityForResult(
      Intent.createChooser(i, "File Browser"),
      FILECHOOSER_RESULTCODE);
  return true;
}

第二步

onActivityResult 中处理

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  if (requestCode == FILECHOOSER_RESULTCODE) {
    if (null == mUploadMessage && null == mUploadCallbackAboveL) return;
    Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
    if (mUploadCallbackAboveL != null) {
      onActivityResultAboveL(requestCode, resultCode, data);
    } else if (mUploadMessage != null) {
      mUploadMessage.onReceiveValue(result);
      mUploadMessage = null;
    }
  }
}

private void onActivityResultAboveL(int requestCode, int resultCode, Intent data) {
  if (requestCode != FILECHOOSER_RESULTCODE
      || mUploadCallbackAboveL == null) {
    return;
  }
  Uri[] results = null;
  if (resultCode == Activity.RESULT_OK) {
    if (data == null) {
    } else {
      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();
          Log.e(TAG, "onActivityResultAboveL: " + results[i].getPath());
        }
      }
      if (dataString != null)
        results = new Uri[]{Uri.parse(dataString)};
      Log.e(TAG, "onActivityResultAboveL: " + results.length);
    }
  }
  mUploadCallbackAboveL.onReceiveValue(results);
  mUploadCallbackAboveL = null;
  return;
}

第三步

将上述代码直接复制到你自己封装的WebView中，大功告成~

最后

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