概述
package cn.hellomrhuang.webapp.webview;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.annotation.RequiresApi;
import android.util.Log;
import android.webkit.GeolocationPermissions;
import android.webkit.JsResult;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebStorage;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
import java.util.ArrayList;
import cn.hellomrhuang.webapp.R;
/**
* Created by bao on 2017/3/3.
*/
public class WebViewHelper {
private static final int FILECHOOSER_RESULTCODE_5 = 12;
private static final int FILECHOOSER_RESULTCODE = 13;
private WebChromeClient.FileChooserParams mfileChooserParams;
ValueCallback<Uri[]> umUploadMessages;
ValueCallback<Uri> mUploadMessage;
private Activity mact;
private WebView mWebView;
private HelperWebViewClient listener;
public WebViewHelper(Activity activity) {
mact = activity;
}
public WebViewHelper(Activity activity, WebView webView) {
mact = activity;
mWebView = webView;
}
public void setWebViewClient(HelperWebViewClient listener) {
this.listener = listener;
}
@SuppressLint("SetJavaScriptEnabled")
public void init(String url) {
if(mWebView== null){
mWebView = (WebView) mact.findViewById(R.id.webView);
}
mWebView.loadUrl(url);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
// 启用数据库
webSettings.setDatabaseEnabled(true);
String dir = mact.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();
// 使用localStorage则必须打开
webSettings.setDomStorageEnabled(true);
// 启用地理定位
webSettings.setGeolocationEnabled(true);
// 设置定位的数据库路径
webSettings.setGeolocationDatabasePath(dir);
// 开启应用程序缓存
webSettings.setAppCacheEnabled(true);
String diri = mact.getApplicationContext().getDir("cache", Context.MODE_PRIVATE).getPath();
// 设置应用缓存的路径
webSettings.setAppCachePath(diri);
// 设置缓存的模式
webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
webSettings.setAllowFileAccess(true);
webSettings.setAllowContentAccess(true);
webSettings.setLoadsImagesAutomatically(true);
//用WebView显示图片，可使用这个参数 设置网页布局类型
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
webSettings.setSupportZoom(false);// 支持缩放
webSettings.setBuiltInZoomControls(false);// 缩放控件
// 设置WebViewClient
mWebView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (listener != null) {
listener.onReceivedTitle(view, url);
}
view.loadUrl(url);
return true;
}
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
//dialog.show();
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
// TODO Auto-generated method stub
super.onReceivedError(view, errorCode, description, failingUrl);
}
public void onConsoleMessage(String message, int lineNumber, String sourceID) {
Log.d("MyApplication", message + " -- From line " + lineNumber + " of " + sourceID);
}
});
// 设置WebChromeClient
mWebView.setWebChromeClient(new WebChromeClient() {
// 扩充缓存的容量
public void onReachedMaxAppCacheSize(long spaceNeeded, long totalUsedQuota,
WebStorage.QuotaUpdater quotaUpdater) {
quotaUpdater.updateQuota(spaceNeeded * 2);
}
// 配置权限（同样在WebChromeClient中实现）
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, false);
super.onGeolocationPermissionsShowPrompt(origin, callback);
}
// 扩充数据库的容量（在WebChromeClinet中实现）
public void onExceededDatabaseQuota(String url, String databaseIdentifier, long currentQuota,
long estimatedSize, long totalUsedQuota, WebStorage.QuotaUpdater quotaUpdater) {
quotaUpdater.updateQuota(estimatedSize * 2);
}
// 处理javascript中的alert
public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
// 构建一个Builder来显示网页中的对话框
AlertDialog.Builder builder = new AlertDialog.Builder(mact);
builder.setTitle("Alert");
builder.setMessage(message);
builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
});
builder.setCancelable(false);
builder.create();
builder.show();
return true;
}
// 处理javascript中的confirm
public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
AlertDialog.Builder builder = new AlertDialog.Builder(mact);
builder.setTitle("confirm");
builder.setMessage(message);
builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
});
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
result.cancel();
}
});
builder.setCancelable(false);
builder.create();
builder.show();
return true;
}
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
umUploadMessages = filePathCallback;
mfileChooserParams = fileChooserParams;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.putExtra("return-data", true);
i.setType("image/*");
i.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
mact.startActivityForResult(Intent.createChooser(i, "选择相册"),
FILECHOOSER_RESULTCODE_5);
return true;
}
// For Android 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.putExtra("return-data", true);
i.setType("image/*");
i.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
mact.startActivityForResult(Intent.createChooser(i, "选择相册"),
FILECHOOSER_RESULTCODE);
}
// For Android > 4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType, String capture) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.putExtra("return-data", true);
i.setType("image/*");
i.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
mact.startActivityForResult(Intent.createChooser(i, "选择相册"),
FILECHOOSER_RESULTCODE);
}
// Andorid 3.0 +
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.putExtra("return-data", true);
i.setType("image/*");
i.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
mact.startActivityForResult(Intent.createChooser(i, "选择相册"),
FILECHOOSER_RESULTCODE);
}
@Override
// 设置网页加载的进度条
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
Log.i("aaa", newProgress + "");
if (listener != null) {
listener.onProgressChanged(view, newProgress);
}
}
// 设置应用程序的标题title
public void onReceivedTitle(WebView view, String title) {
super.onReceivedTitle(view, title);
if (listener != null) {
listener.onReceivedTitle(view, title);
}
}
});
}
public void goBack() {
if (mWebView.canGoBack()) {
mWebView.goBack();
} else {
mact.finish();
}
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == mUploadMessage) return;
if (null == data){
mUploadMessage.onReceiveValue(null);
mUploadMessage = null;
}else{
Uri result = data == null || resultCode != Activity.RESULT_OK ? null
: data.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}else if (requestCode == FILECHOOSER_RESULTCODE_5){// 5.0适配，主要是因为5.0的返回参数不同。
// 处理5.0的callback
if (umUploadMessages != null) {
if (null != data) {
// 5.0的处理方式不同，要注意。
ArrayList<String> resultList = data
.getStringArrayListExtra("data");
umUploadMessages.onReceiveValue(
mfileChooserParams.parseResult(resultCode, data));
umUploadMessages = null;
} else {
umUploadMessages.onReceiveValue(null);
}
}
}
}
public interface HelperWebViewClient {
void onReceivedTitle(WebView view, String title);
void onProgressChanged(WebView view, int newProgress);
void shouldOverrideUrlLoading(WebView view, String url);
}
}
最后
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