Android webview在默認(rèn)情況下是不支持網(wǎng)頁中的文件上傳功能的；

如果在網(wǎng)頁中有，在android webview中訪問時(shí)也會(huì)出現(xiàn)瀏覽文件的按鈕

但是點(diǎn)擊按鈕之后沒有反應(yīng)...

那么如何能夠讓android的webview能夠響應(yīng)，這個(gè)瀏覽按鈕呢？在網(wǎng)上查了很多資料，很多相同的，但都漏掉了一個(gè)地方，導(dǎo)致無法讀取到文件的完整地址(“c:\upfile\233232.jpg”),整理最終代碼入下：

我們需要為webview設(shè)置WebChromeClient，在WebChromeClient的實(shí)現(xiàn)類中覆蓋文件選擇的方法：

package com.example.webviewupfile;

import java.io.File;

import java.io.IOException;

import android.app.Activity;

import android.content.ContentResolver;

import android.content.Intent;

import android.content.res.Configuration;

import android.database.Cursor;

import android.graphics.Bitmap;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.util.Log;

import android.view.View;

import android.webkit.ValueCallback;

import android.webkit.WebChromeClient;

import android.webkit.WebView;

import android.webkit.WebViewClient;

import android.widget.ProgressBar;

public class MainActivity extends Activity {

private ValueCallback mUploadMessage;

private final static int FILECHOOSER_RESULTCODE = 1;

private WebView web;

private ProgressBar progressBar;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

web = (WebView) findViewById(R.id.webView1);

progressBar = (ProgressBar) findViewById(R.id.progressBar1);

web = new WebView(this);

web.getSettings().setJavaScriptEnabled(true);

web.loadUrl("http://ueditor.baidu.com/website/onlinedemo.html");

web.setWebViewClient(new myWebClient());

web.setWebChromeClient(new WebChromeClient() {

// The undocumented magic method override

// Eclipse will swear at you if you try to put @Override here

// For Android 3.0+

public void openFileChooser(ValueCallback uploadMsg) {

mUploadMessage = uploadMsg;

Intent i = new Intent(Intent.ACTION_GET_CONTENT);

i.addCategory(Intent.CATEGORY_OPENABLE);

i.setType("image/*");

MainActivity.this.startActivityForResult(

Intent.createChooser(i, "File Chooser"),

FILECHOOSER_RESULTCODE);

}

// For Android 3.0+

public void openFileChooser(ValueCallback uploadMsg,

String acceptType) {

mUploadMessage = uploadMsg;

Intent i = new Intent(Intent.ACTION_GET_CONTENT);

i.addCategory(Intent.CATEGORY_OPENABLE);

i.setType("*/*");

MainActivity.this.startActivityForResult(

Intent.createChooser(i, "File Browser"),

FILECHOOSER_RESULTCODE);

}

// For Android 4.1

public void openFileChooser(ValueCallback uploadMsg,

String acceptType, String capture) {

mUploadMessage = uploadMsg;

Intent i = new Intent(Intent.ACTION_GET_CONTENT);

i.addCategory(Intent.CATEGORY_OPENABLE);

i.setType("image/*");

MainActivity.this.startActivityForResult(

Intent.createChooser(i, "File Chooser"),

MainActivity.FILECHOOSER_RESULTCODE);

}

});

setContentView(web);

}

@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;

Bitmap bm = null;

//外界的程序訪問ContentProvider所提供數(shù)據(jù) 可以通過ContentResolver接口

ContentResolver resolver = getContentResolver();

try {

Uri originalUri = intent.getData(); // 獲得圖片的uri

bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);

// 這里開始的第二部分，獲取圖片的路徑：

String[] proj = { MediaStore.Images.Media.DATA };

// 好像是android多媒體數(shù)據(jù)庫的封裝接口，具體的看Android文檔

Cursor cursor = managedQuery(originalUri, proj, null, null,

null);

// 按我個(gè)人理解 這個(gè)是獲得用戶選擇的圖片的索引值

int column_index = cursor

.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

// 將光標(biāo)移至開頭 ，這個(gè)很重要，不小心很容易引起越界

cursor.moveToFirst();

// 最后根據(jù)索引值獲取圖片路徑

String path = cursor.getString(column_index);

Uri uri = Uri.fromFile(new File(path));

mUploadMessage.onReceiveValue(uri);

} catch (IOException e) {

Log.e("TAG-->Error", e.toString());

}

}

}

public class myWebClient extends WebViewClient {

@Override

public void onPageStarted(WebView view, String url, Bitmap favicon) {

// TODO Auto-generated method stub

super.onPageStarted(view, url, favicon);

}

@Override

public boolean shouldOverrideUrlLoading(WebView view, String url) {

// TODO Auto-generated method stub

view.loadUrl(url);

return true;

}

@Override

public void onPageFinished(WebView view, String url) {

// TODO Auto-generated method stub

super.onPageFinished(view, url);

progressBar.setVisibility(View.GONE);

}

}

// flipscreen not loading again

@Override

public void onConfigurationChanged(Configuration newConfig) {

super.onConfigurationChanged(newConfig);

}

// To handle "Back" key press event for WebView to go back to previous

// screen.

/*

* @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if

* ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) { web.goBack();

* return true; } return super.onKeyDown(keyCode, event); }

*/

}

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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