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我有一个 Activity。有原生 java Unity 视图。然后在它上面的 webview 来显示 HTML。所以这个 Activity 有 Unity 和 HTML 视图堆叠在一起。以下是活动：

protected void onCreate (Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);

    mUnityPlayer = new UnityPlayer(this);

    context = this;

    if (mUnityPlayer.getSettings ().getBoolean ("hide_status_bar", true))
        getWindow ().setFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN,
                               WindowManager.LayoutParams.FLAG_FULLSCREEN);

    int glesMode = mUnityPlayer.getSettings().getInt("gles_mode", 1);
    boolean trueColor8888 = false;
    mUnityPlayer.init(glesMode, trueColor8888);

    View playerView = mUnityPlayer.getView();
    setContentView(playerView);
    playerView.requestFocus();

    mJSInterface = new JSInterface();        

    Log.e("Cookie", "COOKIE SUPPORT!");

        mWebView = new WebView(this);



        FrameLayout layout = new FrameLayout(this);
        addContentView(layout, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
        layout.addView(mWebView, new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, Gravity.NO_GRAVITY));
        // Basic settings of WebView.

        mWebView.setBackgroundColor(Color.TRANSPARENT);

        WebSettings webSettings = mWebView.getSettings();
        webSettings.setSupportZoom(false);
        webSettings.setJavaScriptEnabled(true);
        webSettings.setPluginsEnabled(true);



        mWebView.setWebViewClient(new WebViewClient(){});


       /* mJSInterface = new JSInterface();
        mWebView.addJavascriptInterface(mJSInterface, "UnityInterface");*/


        mWebView.addJavascriptInterface(mJSInterface, "UnityInterface");

        // Start in invisible state.
        mWebView.setVisibility(View.GONE);


}

我也有一个自定义视图类。我想在这个活动之上设置这个类。这是我的视图类：

public class PrintView extends LinearLayout {

    WebView wv;

    public PrintView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        View.inflate(context, R.layout.printscreen, this);

        wv = (WebView) findViewById(R.id.webViewPrint);
        wv.loadUrl(Constant.printUrl);

    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        // TODO Auto-generated method stub
        for(int i = 0 ; i < getChildCount() ; i++){
            getChildAt(i).layout(l, t, r, b);
        }
    }


}

在我的活动中有一个方法“loadPrintActivity”。当调用此方法时，我想要 Activity 顶部的视图类。这是方法：

    public void loadPrintActivity(String printUrl) {
    PrintView pv = new PrintView(context);
    setContentView(pv);
}

我用过。但它不起作用。帮我。

4

1 回答 1

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在 Android 中，您可以像这样启动另一个 Activity：

    public void loadPrintActivity(String printUrl) {
        Intent intent = new Intent(this, Activity.class);
        startActivity(intent);
    }

从当前处于前台的 Activity 中。然后，Android 会维护一个 Activity 堆栈，如果用户按下“返回”按钮，他将返回到上一个 Activity。您可以在活动onResume和onPause.

有关更多信息，请查看 Android's Guide about back stack。

于 2013-10-03T10:44:09.457 回答