Android webview打开本地图片上传实现代码
Webview打开本地图片选择器十分之麻烦，其在安卓系统3x4x5x上的行为都不同，处理也不同，所以之前差点崩溃。经过测试和完善，最终其在各个版本上都能完美工作。
直接上代码
packagecom.testandroid.webview;
importandroid.content.Intent;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.support.v7.app.AlertDialog;
importandroid.support.v7.app.AppCompatActivity;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.webkit.JsResult;
importandroid.webkit.ValueCallback;
importandroid.webkit.WebBackForwardList;
importandroid.webkit.WebChromeClient;
importandroid.webkit.WebView;
importandroid.webkit.WebViewClient;
importandroid.widget.Button;
importcom.testandroid.R;
publicclassWebViewActivityextendsAppCompatActivity{
privatefinalStringTAG=WebViewActivity.class.getSimpleName();
privateButtonbutton;
privateWebViewwebView;
privateStringrecgPic="http://m.shitu.chinaso.com/mx/index.html";
publicfinalstaticintFILECHOOSER_RESULTCODE=1;
publicfinalstaticintFILECHOOSER_RESULTCODE_FOR_ANDROID_5=2;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
button=(Button)findViewById(R.id.button);
button.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
}
});
initTestWebView();
}
privatevoidinitTestWebView(){
webView=(WebView)findViewById(R.id.tempWebView);
WiewSettingssettings=webView.getSettings();
settings.setJavaScriptEnabled(true);
webView.setWebChromeClient(newWebChromeClient(){
@Override
publicbooleanonJsAlert(WebViewview,Stringurl,Stringmessage,JsResultresult){
AlertDialog.Builderbuilder=newAlertDialog.Builder(view.getContext());
builder.setTitle("xxx提示").setMessage(message).setPositiveButton("确定",null);
builder.setCancelable(false);
builder.setIcon(R.mipmap.ic_launcher);
AlertDialogdialog=builder.create();
dialog.show();
result.confirm();
returntrue;
}
//扩展浏览器上传文件
//3.0++版本
publicvoidopenFileChooser(ValueCallback<Uri>uploadMsg,StringacceptType){
openFileChooserImpl(uploadMsg);
}
//3.0--版本
publicvoidopenFileChooser(ValueCallback<Uri>uploadMsg){
openFileChooserImpl(uploadMsg);
}
publicvoidopenFileChooser(ValueCallback<Uri>uploadMsg,StringacceptType,Stringcapture){
openFileChooserImpl(uploadMsg);
}
@Override
publicbooleanonShowFileChooser(WebViewwebView,ValueCallback<Uri[]>filePathCallback,FileChooserParamsfileChooserParams){
onenFileChooseImpleForAndroid(filePathCallback);
returntrue;
}
});
webView.setWebViewClient(newWebViewClient(){
@Override
publicbooleanshouldOverrideUrlLoading(WebViewview,Stringurl){
view.loadUrl(url);
returntrue;
}
});
webView.loadUrl(recgPic);
}
publicValueCallback<Uri>mUploadMessage;
privatevoidopenFileChooserImpl(ValueCallback<Uri>uploadMsg){
mUploadMessage=uploadMsg;
Intenti=newIntent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i,"FileChooser"),FILECHOOSER_RESULTCODE);
}
publicValueCallback<Uri[]>mUploadMessageForAndroid5;
privatevoidonenFileChooseImpleForAndroid(ValueCallback<Uri[]>filePathCallback){
mUploadMessageForAndroid5=filePathCallback;
IntentcontentSelectionIntent=newIntent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("image/*");
IntentchooserIntent=newIntent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT,contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE,"ImageChooser");
startActivityForResult(chooserIntent,FILECHOOSER_RESULTCODE_FOR_ANDROID_5);
}
@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentintent){
if(requestCode==FILECHOOSER_RESULTCODE){
if(null==mUploadMessage)
return;
Uriresult=intent==null||resultCode!=RESULT_OK?null:intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage=null;
}elseif(requestCode==FILECHOOSER_RESULTCODE_FOR_ANDROID_5){
if(null==mUploadMessageForAndroid5)
return;
Uriresult=(intent==null||resultCode!=RESULT_OK)?null:intent.getData();
if(result!=null){
mUploadMessageForAndroid5.onReceiveValue(newUri[]{result});
}else{
mUploadMessageForAndroid5.onReceiveValue(newUri[]{});
}
mUploadMessageForAndroid5=null;
}
}
@Override
publicbooleanonKeyDown(intkeyCode,KeyEventevent){
if(webView.canGoBack()&&event.getKeyCode()==KeyEvent.KEYCODE_BACK){
//获取历史列表
WebBackForwardListmWebBackForwardList=webView
.copyBackForwardList();
//判断当前历史列表是否最顶端,其实canGoBack已经判断过
if(mWebBackForwardList.getCurrentIndex()>0){
webView.goBack();
returntrue;
}
}
returnsuper.onKeyDown(keyCode,event);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。