Webview打开本地图片选择器十分之麻烦，其在安卓系统3x 4x 5x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

package com.testandroid.webview;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.KeyEvent;import android.view.View;import android.webkit.JsResult;import android.webkit.ValueCallback;import android.webkit.WebBackForwardList;import android.webkit.WebChromeClient;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import com.testandroid.R;public class WebViewActivity extends AppCompatActivity { private final String TAG = WebViewActivity.class.getSimpleName(); private Button button; private WebView webView; private String recgPic = "http://m.shitu.chinaso.com/mx/index.html"; public final static int FILECHOOSER_RESULTCODE = 1; public final static int FILECHOOSER_RESULTCODE_FOR_ANDROID_5 = 2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_web_view); button = (Button) findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { } }); initTestWebView(); } private void initTestWebView() { webView = (WebView) findViewById(R.id.tempWebView); WiewSettings settings = webView.getSettings(); settings.setJavaScriptEnabled(true); webView.setWebChromeClient(new WebChromeClient() { @Override public boolean onJsAlert(WebView view, String url, String message, JsResult result) { AlertDialog.Builder builder = new AlertDialog.Builder(view.getContext()); builder.setTitle("xxx提示").setMessage(message).setPositiveButton("确定", null); builder.setCancelable(false); builder.setIcon(R.mipmap.ic_launcher); AlertDialog dialog = builder.create(); dialog.show(); result.confirm(); return true; } //扩展浏览器上传文件 //3.0++版本 public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) { openFileChooserImpl(uploadMsg); } //3.0--版本 public void openFileChooser(ValueCallback<Uri> uploadMsg) { openFileChooserImpl(uploadMsg); } public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) { openFileChooserImpl(uploadMsg); } @Override public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) { onenFileChooseImpleForAndroid(filePathCallback); return true; } }); webView.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } }); webView.loadUrl(recgPic); } public ValueCallback<Uri> mUploadMessage; private void openFileChooserImpl(ValueCallback<Uri> uploadMsg) { mUploadMessage = uploadMsg; Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.addCategory(Intent.CATEGORY_OPENABLE); i.setType("image/*"); startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE); } public ValueCallback<Uri[]> mUploadMessageForAndroid5; private void onenFileChooseImpleForAndroid(ValueCallback<Uri[]> filePathCallback) { mUploadMessageForAndroid5 = filePathCallback; Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT); contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE); contentSelectionIntent.setType("image/*"); Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER); chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent); chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser"); startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5); } @Override protected void onActivityResult(int requestCode, int resultCode,Intent intent) { if (requestCode == FILECHOOSER_RESULTCODE) { if (null == mUploadMessage) return; Uri result = intent == null || resultCode != RESULT_OK ? null: intent.getData(); mUploadMessage.onReceiveValue(result); mUploadMessage = null; } else if (requestCode == FILECHOOSER_RESULTCODE_FOR_ANDROID_5){ if (null == mUploadMessageForAndroid5) return; Uri result = (intent == null || resultCode != RESULT_OK) ? null: intent.getData(); if (result != null) { mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result}); } else { mUploadMessageForAndroid5.onReceiveValue(new Uri[]{}); } mUploadMessageForAndroid5 = null; } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (webView.canGoBack() && event.getKeyCode() == KeyEvent.KEYCODE_BACK) { //获取历史列表 WebBackForwardList mWebBackForwardList = 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(); return true; } } return super.onKeyDown(keyCode, event); }}

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