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 uploadMsg, String acceptType) {

openFileChooserImpl(uploadMsg);

}

//3.0--版本

public void openFileChooser(ValueCallback uploadMsg) {

openFileChooserImpl(uploadMsg);

}

public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {

openFileChooserImpl(uploadMsg);

}

@Override

public boolean onShowFileChooser(WebView webView, ValueCallback 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 mUploadMessage;

private void openFileChooserImpl(ValueCallback 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 mUploadMessageForAndroid5;

private void onenFileChooseImpleForAndroid(ValueCallback 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);

}

}

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脚本之家。