android webview在默认情况下是不支持网页中的文件上传功能的；
如果在网页中有<input type="file" />，在android webview中访问时也会出现浏览文件的按钮
但是点击按钮之后没有反应...
那么如何能够让android的webview能够响应，这个浏览按钮呢？
我们需要为webview设置WebChromeClient，在WebChromeClient的实现类中覆盖文件选择的方法：
private ValueCallback<Uri> mUploadMessage;
/**
* 适配5.0系统
*/
private ValueCallback<Uri[]> mUploadMessage5;
// 上传事件处理
mWebView.setWebChromeClient(new WebChromeClient() {
// Andorid 4.1+
public void openFileChooser(ValueCallback<Uri> uploadFile,
String acceptType, String capture) {
openFileChooser(uploadFile);
}
// Andorid 3.0 +
public void openFileChooser(ValueCallback<Uri> uploadFile,
String acceptType) {
openFileChooser(uploadFile);
}
// Android 3.0
public void openFileChooser(ValueCallback<Uri> uploadFile) {
mUploadMessage = uploadFile;
OpenUpLoadFolder();
}
// 适配5.0系统
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public boolean onShowFileChooser(WebView webView,
ValueCallback<Uri[]> filePathCallback,
FileChooserParams fileChooserParams) {
mUploadMessage5 = filePathCallback;
OpenUpLoadFolder();
return true;
}
});
/*** 上傳文件對話框****/
private void OpenUpLoadFolder() {
final CharSequence[] items = { "拍照", "相册", "取消" };
AlertDialog dlg = new AlertDialog.Builder(SencondActivity.this)
.setTitle("选择图片").setCancelable(false)
.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
// 这里item是根据选择的方式，
if (item == 0) {
startActivityForResult(Intent.createChooser(
CameracaptuIntent(), "File Chooser"),
FILECHOOSER_CameraCapture);
} else if (item == 1) {
startActivityForResult(Intent.createChooser(
createCameraIntent(), "File Chooser"),
FILECHOOSER_RESULTCODE);
} else if (item == 2) {
if (mUploadMessage5 != null) {
mUploadMessage5.onReceiveValue(null);
mUploadMessage5 = null;
}
if (mUploadMessage != null) {
mUploadMessage.onReceiveValue(null);
mUploadMessage = null;
}
}
}
}).create();
dlg.show();
}
/*** 选择图片文件 ****/
private Intent createCameraIntent() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
//intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
return intent;
}
Uri cameraUri=null;
/*** 拍照 ****/
private Intent CameracaptuIntent() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 拍照
String sdStatus = Environment.getExternalStorageState();
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
// return;
}
File out = new File(
Environment.getExternalStorageDirectory().getPath(), ImageName);
if (!out.exists()) {
out.mkdirs();
}
String Picname = new DateFormat().format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
out = new File(Environment.getExternalStorageDirectory().getPath(),
ImageName + "/" + Picname);
cameraUri = Uri.fromFile(out);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, cameraUri);
return cameraIntent;
}
/*** 回調****/
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == FILECHOOSER_CameraCapture) {
if (null == mUploadMessage && null == mUploadMessage5)
return;
Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
if (mUploadMessage5 != null) {
Uri[] results = null;
if (resultCode == Activity.RESULT_OK) {
if (data == null) {
results = new Uri[]{cameraUri};
} 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();
}
}
if (dataString != null)
results = new Uri[]{Uri.parse(dataString)};
}
} mUploadMessage5.onReceiveValue(results);
mUploadMessage5= null;
} else if (mUploadMessage != null) {
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;}
}
if (requestCode == FILECHOOSER_RESULTCODE) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (null == mUploadMessage5) {
mUploadMessage5.onReceiveValue(null);
mUploadMessage5=null;
return;
}
if (resultCode == RESULT_CANCELED) {
if (mUploadMessage5 != null) {
mUploadMessage5.onReceiveValue(null);
mUploadMessage5=null;
return;
}
}
} else {
if (null == mUploadMessage) {
mUploadMessage.onReceiveValue(null);
mUploadMessage = null;
return;
}
if (resultCode == RESULT_CANCELED) {
if (mUploadMessage != null) {
mUploadMessage.onReceiveValue(null);
mUploadMessage = null;
return;
}
}
}
if (data == null)
return;
Uri result = data == null || resultCode != RESULT_OK ? null : data
.getData();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mUploadMessage5.onReceiveValue(new Uri[] { result });
mUploadMessage5=null;
} else {
mUploadMessage.onReceiveValue(result);
mUploadMessage=null;
}
}
}
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