从 URL 打开 PDF

Question

我是android开发的新手。我必须显示来自 URL 的 PDF。

这是我当前的代码，但我无法显示 PDF 文件：

public class TestActivity extends Activity 
{

    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        System.setProperty("http.proxyHost","192.168.0.2");
        System.setProperty("http.proxyPort","8080");

        showPdf();
    }    

    private void showPdf() 
    {
        WebView webview = new WebView(this); 
        setContentView(webview); 
        webview.getSettings().setJavaScriptEnabled(true); 
        Log.v("....hello....","");
        webview.loadUrl("http://docs.google.com/gview?embedded=true&url=http://myurl.com/demo.pdf");

    }

}

Logcat：

10-11 14:50:49.586: ERROR/AndroidRuntime(537): FATAL EXCEPTION: main
10-11 14:50:49.586: ERROR/AndroidRuntime(537): android.app.SuperNotCalledException: Activity {com.vidushi.Test/com.vidushi.Test.TestActivity} did not call through to super.onCreate()
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2629)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.os.Looper.loop(Looper.java:123)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at android.app.ActivityThread.main(ActivityThread.java:4627)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at java.lang.reflect.Method.invokeNative(Native Method)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at java.lang.reflect.Method.invoke(Method.java:521)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-11 14:50:49.586: ERROR/AndroidRuntime(537):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

它在这里工作得很好。还是建议您测试一下您是否在 AndroidManifest.xml 文件中添加了 INTERNET 权限：

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

更新：

您要打开的链接是： http://litofinter.es.milfoil.arvixe.com/PDF/Book6.pdf

现在它在这里也工作正常：