如何从android中的webview获取所选部分的开始和结束位置

时间:2011-12-21 08:12:15

标签: android webview textselection

在网页视图中,我发现长按时默认选择。但选择后,我们必须点击所选部分才能复制到剪贴板。我想在按下按钮的时候将所选部分复制到剪贴板。我可以让它成为可能请帮助我......

1 个答案:

答案 0 :(得分:3)

您可以执行webview的方法javascript:

方法javascript获取元素id,开始位置和结束位置

 function(){
 var html = ""; 
 if (typeof window.getSelection != "undefined") {
  var sel = window.getSelection(); 
 } 
 return      sel.anchorNode.parentElement.id+':'+sel.anchorOffset+':'+sel.focusOffset; 
 })();

在webview上执行:

webview.evaluateJavascript(script, new ValueCallback<String>() {
    @Override
    public void onReceiveValue(String s) {
        selectedData = s; //value of javascript return
        selectedData = selectedData.replaceAll("\"", "");
        String array[] = new String[3];
        elementId = array[0];
        startPosition=array[1];
        endPosition=array[2];
        Log.d("WebView runtime", selectedText); 
    }
});

如果你想获得选择文本,请使用:

 function(){
 var html = ""; 
 if (typeof window.getSelection != "undefined") {
  var sel = window.getSelection(); 
 } 
 return sel.text; 
 })();

要执行此方法的调用,您可以创建自定义回调

private class TesteCallback implements Callback {

    private MyWebView mywebview;

    private TextMark textmark;

    public TesteCallback(MyWebView mywebview) {
        this.mywebview = mywebview;

    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {

        mode.setTitle("Chose color");

        mode.getMenuInflater().inflate(R.menu.pagina2, menu);

        return true;
    }

    /**
     * create custom itens, remove useless itens
     */
    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        menu.removeItem(android.R.id.selectAll);
        // Remove the "cut" option
        menu.removeItem(android.R.id.cut);
        // Remove the "copy all" option
        menu.removeItem(android.R.id.copy);

        return true;
    }
@Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        mywebview.pegarSelecao();

        textmark = new TextMark();
        switch (item.getItemId()) {
        case R.id.red:
            // do some stuff

            break;
        case R.id.yellow:
            // do some stuff

            break;
        case R.id.blue:
            // do some stuff

            break;
        default:

            break;
        }

        return false;
    }
}//end class

如果您需要使用自定义回调,则需要创建自定义Web视图并调用回调:

public class MyWebView extends WebView {
public MyWebView(Context context) {

    super(context);
    this.contexto = context;

}
public MyWebView(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
}

public MyWebView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub
}
private ActionMode.Callback mActionModeCallback;

///////////////////////////////////////////
@Override
public ActionMode startActionMode(Callback callback) {
    ViewParent parent = getParent();
    if (parent == null) {
        return null;
    }

    mActionModeCallback = new TesteCallback(this); //this line call custom callback
    return parent.startActionModeForChild(this, mActionModeCallback);
}

}