Question

我正在研究Android的电子书阅读器。我在无滚动的webview中设置了我的内容。为了翻页，我想创建一种页面/拖动效果，如下所示： http://www.youtube.com/watch?v=sd5f4nauKTE#t=1m8s

我已经在我的webview上设置了一个onTouchListener，并将它的缓存图像添加到了ImageView，并设法用它的手指将它拖动，但我在路上设置动画时遇到了麻烦。

到目前为止，这是我的代码：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


    <ImageView
        android:id="@+id/imgContentBitmap"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="center"
    />

    <ImageView
        android:id="@+id/imgNext"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="center"
    />

    <ImageView
        android:id="@+id/imgPrev"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="center"
    />

    <android.webkit.WebView
        android:id="@+id/webPageContent"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
    </android.webkit.WebView>
</FrameLayout>

活动：

public class TestPageActivity extends Activity {
    /** Called when the activity is first created. */

    private WebView webView;
    private Bitmap bitmap;
    private ImageView contentBitmap;
    private FrameLayout.LayoutParams params;
    private int pressedX;

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

        params = new FrameLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT);
        params.leftMargin = 0;
        params.topMargin = 0;

        webView = (WebView) findViewById(R.id.webPageContent);

        webView.setVerticalScrollBarEnabled(false);
        webView.setHorizontalScrollBarEnabled(false);

        ((FrameLayout)(webView.getParent())).setOnTouchListener(new OnTouchListener(){
            @Override
            public boolean onTouch(View v, MotionEvent event){

                int eventAction = event.getAction();
                int currentX = (int) event.getX();

                Log.d("main", "current x = "+currentX);
                Log.d("main", "pressed x = "+pressedX);

                switch(eventAction){
                    case MotionEvent.ACTION_DOWN:
                        Log.d("main", "down");
                        pressedX = (int) event.getX();
                        break;
                    case MotionEvent.ACTION_MOVE:
                        Log.d("main", "move");
                        params.leftMargin = (pressedX-currentX);
                        contentBitmap.setLayoutParams(params);
                        break;
                    case MotionEvent.ACTION_UP:
                        Log.d("main", "up");
                        break;
                }
                return true;
            }
        });

        webView.loadData(getString(R.string.lorem_ipsum), "text/html", "utf-8");

        webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url) {

            }
        });

        webView.setPictureListener(new PictureListener() {

            @Override
            public void onNewPicture(WebView view, Picture picture){
                webView.setDrawingCacheEnabled(true);
                webView.layout(0, 0, webView.getWidth(), webView.getBottom());
                webView.buildDrawingCache(true);
                bitmap = Bitmap.createBitmap(webView.getDrawingCache());
                webView.setVisibility(WebView.INVISIBLE);

                webView.setDrawingCacheEnabled(false);

                contentBitmap.setImageBitmap(bitmap);
                webView.setPictureListener(null);

            }
        });

        contentBitmap = (ImageView) findViewById(R.id.imgContentBitmap);
        /*

        contentBitmap.setImageBitmap(bitmap);*/

    }
}

Answer 1

找到解决方案？否则我会说，您可以将Fragment设置为视图，并使用FragmentManager和FragmentTransaction将视图放在Activity中。之后，您可以使用以下命令向事件添加动画：setCustomAnimation（R.anim.New_in，R.anim.Old_out，R.anim.Old_in，R.anim.New_out）;

拖动“页面”动画

1 个答案: