android - 如何在 LinearLayout 中设置 WebView

Question

我正在尝试在线性布局中设置 webview。我刚刚在线性布局中创建了一个 xml 线性布局文件、进度条和一个 webview..

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ProgressBar
        android:id="@+id/progWeb"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/darker_gray"
        android:max="100"
        android:visibility="invisible" />

    <WebView
        android:id="@+id/web"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

java文件只显示进度条。此代码未显示 Webview

public class MainActivity extends Activity {

    private WebView web;
    private ProgressBar progBar;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_PROGRESS);
        setContentView(R.layout.activity_main);
        web = (WebView) findViewById(R.id.web);
        progBar = (ProgressBar) findViewById(R.id.progWeb);

        progBar.setVisibility(ProgressBar.INVISIBLE);
        String url = "http://www.google.com.pk/";

        web.getSettings().setJavaScriptEnabled(true);
        web.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) {
                System.out.println(progress);
                progBar.setProgress(progress);

                if (progress == 100) {
                    progBar.setVisibility(ProgressBar.INVISIBLE);
                    progBar.setProgress(0);
                } else {
                    progBar.setVisibility(ProgressBar.VISIBLE);
                }
            }
        });

        web.loadUrl(url);

    }
}

Answer 1

需要设置LinearLayout的方向为vertical，默认为horizo​​ntal