图片上传
H5使用file标签进行文件上传，我们可以重写webview的webchromeClient中的openFileChooser方法，由于android系统有多个版本，因此需要重写多个openFileChooser进行兼容，而android5.0以后，需要重写onShowFileChooser方法，其上传的参数Uri变成了Uri[]类型，说明5.0以后支持多传图片。
private class MyWebClient extends WebChromeClient {
// For Android 5.0+
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> valueCallback,
android.webkit.WebChromeClient.FileChooserParams fileChooserParams) {
//打开图库
}
// For Android 3.0+
public void openFileChooser(ValueCallback uploadMsg) {
//打开图库
}
//3.0--版本
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
openFileChooser(uploadMsg);
}
// For Android 4.1
public void openFileChooser(ValueCallback uploadMsg, String acceptType,
String capture) {
openFileChooser(uploadMsg);
}
｝
然后在onActivityResult中处理返回的结果
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if (requestCode == FILECHOOSER_RESULTCODE) {
//处理返回的图片，并进行上传
}
}
需要注意的事，上传的给图片的路径必须是Uri格式，在实际测试中发现，大部分手机能识别file开头的uri，但有少部分手机，如魅族，vivo不识别该种uri格式，只识别content开头的uri，因此，需要做兼容处理，调用的系统图库，默认返回的uri为content开头，兼容较好，自定义图库则为file开头。
具体代码如下：
private ValueCallback<Uri> mUploadMessage;
private ValueCallback<Uri[]> mValueCallback;
private int selectImgMax = 1;//选取图片最大数量
private int photosType = 0;//图库类型
private class MyWebClient extends WebChromeClient {
// For Android 5.0+
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> valueCallback,
android.webkit.WebChromeClient.FileChooserParams fileChooserParams) {
mValueCallback = valueCallback;
selectImgMax = selectImgMax > 1 ? selectImgMax : 1;
goToPhotos(selectImgMax);
return true;
}
// For Android 3.0+
public void openFileChooser(ValueCallback uploadMsg) {
mUploadMessage = uploadMsg;
selectImgMax = 1;
goToPhotos(selectImgMax);
}
//3.0--版本
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
openFileChooser(uploadMsg);
}
// For Android 4.1
public void openFileChooser(ValueCallback uploadMsg, String acceptType,
String capture) {
openFileChooser(uploadMsg);
}
/**
* 进入本地图库
*
* @param select_image_max //设置选取最大值
*/
private void goToPhotos(int select_image_max) {
Intent i;
if (photosType <= 0) {//进入自定义图库
i = new Intent(WebviewAct.this, MediaSelectActivity.class);
i.putExtra("select_mode", 2);
i.putExtra("select_image_max", select_image_max);
WebviewAct.this.startActivityForResult(i, FILECHOOSER_RESULTCODE);
} else {//进入系统图库
i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
WebviewAct.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}
}
@Override
public void onProgressChanged(WebView view, int newProgress) {
if (newProgress == 100) {
progressbar.setVisibility(View.GONE);
} else {
if (progressbar.getVisibility() == View.GONE)
progressbar.setVisibility(View.VISIBLE);
progressbar.setProgress(newProgress);
}
super.onProgressChanged(view, newProgress);
}
@Override
public void onReceivedTitle(WebView view, String title) {
if (TextUtils.isEmpty(mytitle)) {
titleTextView.setText(title);
}
super.onReceivedTitle(view, title);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if (requestCode == FILECHOOSER_RESULTCODE) {
if (this.photosType <= 0) {//调用自定义图库
uploadImgFromMyPhotos();
} else {//调用系统图库
uploadImgFromSysPhotos(resultCode, intent);
}
}
}
/**
* 上传图片,调用系统图库 与h5 file标签交互
*
* @param resultCode
* @param intent
* @author linjinpeng 2015年11月30日 14:25:20
*/
private void uploadImgFromSysPhotos(int resultCode, Intent intent) {
if (mUploadMessage != null) {//5.0以下
Uri result = intent == null || resultCode != RESULT_OK ? null
: intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
} else if (mValueCallback != null) {//5.0+
Uri[] uris = new Uri[1];
uris[0] = intent == null || resultCode != RESULT_OK ? null
: intent.getData();
if (uris[0]!=null){
mValueCallback.onReceiveValue(uris);
}
mValueCallback = null;
}
}
/**
* 上传图片，调用自己图库 与h5 file标签交互
*
* @author linjinpeng 2015年11月30日 12:22:23
*/
private void uploadImgFromMyPhotos() {
if (mValueCallback != null) {//5.0+
Uri[] uris = MediaSelectHelper.getImgPathToUriArray();
if (uris != null){
mValueCallback.onReceiveValue(uris);
}
mValueCallback = null;
} else if (mUploadMessage != null) {//5.0及以下
Uri uri = MediaSelectHelper.getImgPathToUri();
mUploadMessage.onReceiveValue(uri);
mUploadMessage = null;
}
}
/**
* js调用 setSelectImgMax 设置本地图片选取图片数量的最大值
*
* @param selectImgMax 默认值为1
* @param photosType type<=0?调用自己的图库:调用系统图库
* @author linjinpeng 2015年11月30日 12:17:48
*/
@JavascriptInterface
public void setSelectImgMax(int selectImgMax, int photosType) {
this.selectImgMax = selectImgMax;
this.photosType = photosType;
}
网友评论
会是返回前一页吗？因为我做的项目就存在这种情况