Android 解决WebView无法上传文件的问题

Android 解决WebView无法上传文件的问题

Android原生的WebView并不支持上传文件,需要我们自己实现相应的方法。于是我把工作中的相关代码记录下来。下次直接拿来用就行了。一点一滴都是经验。

1。需要定义三个变量

private ValueCallback<Uri[]> uploadMessageAboveL;

private final static int FILE_CHOOSER_RESULT_CODE = 10000;

private ValueCallback<Uri> uploadMessage;

2.重写Activity相关方法

private void openImageChooserActivity() {

Intent i = new Intent(Intent.ACTION_GET_CONTENT);

i.addCategory(Intent.CATEGORY_OPENABLE);

i.setType("image/*");

startActivityForResult(Intent.createChooser(i, "Image Chooser"), FILE_CHOOSER_RESULT_CODE);

}

@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) {

onActivityResultAboveL(requestCode, resultCode, data);

} else if (uploadMessage != null) {

uploadMessage.onReceiveValue(result);

uploadMessage = null;

}

}

}

@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();

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)};

}

}

uploadMessageAboveL.onReceiveValue(results);

uploadMessageAboveL = null;

}

3.重写WebChromeClient中的相关方法

// For Android < 3.0

public void openFileChooser(ValueCallback<Uri> valueCallback) {

uploadMessage = valueCallback;

openImageChooserActivity();

}

// For Android >= 3.0

public void openFileChooser(ValueCallback valueCallback, String acceptType) {

uploadMessage = valueCallback;

openImageChooserActivity();

}

//For Android >= 4.1

public void openFileChooser(ValueCallback<Uri> valueCallback, String acceptType, String capture) {

uploadMessage = valueCallback;

openImageChooserActivity();

}

// For Android >= 5.0

@Override

public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {

uploadMessageAboveL = filePathCallback;

openImageChooserActivity();

return true;

}

感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!

以上是 Android 解决WebView无法上传文件的问题 的全部内容, 来源链接: utcz.com/z/324811.html

回到顶部