public class MyWb extends Activity {

    /** Called when the activity is first created. */

    WebView web;

    ProgressBar progressBar;

    private ValueCallback<Uri> mUploadMessage;

    private final static int FILECHOOSER_RESULTCODE = ;

    @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;

        }

    }

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        web = (WebView) findViewById(R.id.webview01);

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

        web = new WebView(this);

        web.getSettings().setJavaScriptEnabled(true);

        web.loadUrl("http://www.script-tutorials.com/demos/199/index.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<Uri> uploadMsg) {

                mUploadMessage = uploadMsg;

                Intent i = new Intent(Intent.ACTION_GET_CONTENT);

                i.addCategory(Intent.CATEGORY_OPENABLE);

                i.setType("image/*");

                MyWb.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("*/*");

                MyWb.this.startActivityForResult(Intent.createChooser(i, "File Browser"), 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.setType("image/*");

                MyWb.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), MyWb.FILECHOOSER_RESULTCODE);

            }

        });

        setContentView(web);

    }

    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); }

     */

}

三星、华为等android里webview不支持input file的解决方法

由于安全因素android webview屏蔽了文件上传控件，但是他并没有完全封掉。

<form method="POST" enctype="multipart/form-data">

File to upload: <input type="file" name="uploadfile">&nbsp;&nbsp;

<input type="submit" value="Press to Upload..."> to upload the file!

</form>

1.activity定义

public ValueCallback<Uri> mUploadMessage;

public final static int FILECHOOSER_RESULTCODE = ;

2.扩展WebChromeClient

WebChromeClient chromeClient = new WebChromeClientImpl();
view.setWebChromeClient(chromeClient);

3.实现WebChromeClientImpl类

private class WebChromeClientImpl extends WebChromeClient{

 //扩展支持alert事件

 @Override

 public boolean onJsAlert(WebView view, String url, String message,JsResult result) {

    Builder builder = new Builder(view.getContext());

    builder.setTitle("商机通提示").setMessage(message).setPositiveButton("确定", null);

    builder.setCancelable(false);

    builder.setIcon(R.drawable.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&lt;Uri&gt; uploadMsg, String acceptType) {

    mUploadMessage = uploadMsg;

    Intent i = new Intent(Intent.ACTION_GET_CONTENT);

    i.addCategory(Intent.CATEGORY_OPENABLE);

    i.setType("*/*");

    activity.startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);

 }

 //3.0--版本

 public void openFileChooser(ValueCallback&lt;Uri&gt; uploadMsg) {

    mUploadMessage = uploadMsg;

    Intent i = new Intent(Intent.ACTION_GET_CONTENT);

    i.addCategory(Intent.CATEGORY_OPENABLE);

    i.setType("*/*");

    activity.startActivityForResult(Intent.createChooser(i, "file Browser"),FILECHOOSER_RESULTCODE);

   }

 }

以下是所有的android版本的一个完整的解决方案

public class MyWb extends Activity {

 /** Called when the activity is first created. */

 WebView web;

 ProgressBar progressBar;

 private ValueCallback mUploadMessage;

 private final static int FILECHOOSER_RESULTCODE=;

 @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;

  }

 }

@Override

public void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.main);

 web = (WebView) findViewById(R.id.webview01);

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

 web = new WebView(this);

 web.getSettings().setJavaScriptEnabled(true);

 web.loadUrl("http://www.script-tutorials.com/demos/199/index.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/*");

      MyWb.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("*/*");

    MyWb.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/*");

    MyWb.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ), MyWb.FILECHOOSER_RESULTCODE );

 }

 });

 setContentView(web);

}

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) &amp;&amp; web.canGoBack()) {

 web.goBack();

 return true;

 }

 return super.onKeyDown(keyCode, event);

}*/

}

此外，我想补充一点， “上传页面”像在这个例子中， < 4个版本不会工作，因为它有一个图像预览功能，如果你想使它工作使用一个简单的php上传无预览。

对于一些手机品牌修改了android浏览器，比如：三星，我们可以查看他们官网找到解决办法的。samsung developers

转载自郑州网建-前端开发　http://camnpr.com/
本文链接：http://camnpr.com/archives/1093.html

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