Question

我在我的应用中成功实现了一个向下滑动的面板。从我在stackoverflow上找到的答案动画。

但是我正在努力实现一些功能。我不知道该怎么做。我已经坐了几个小时试图找出怎么做但我仍然无法解决我的问题。

我的布局包含2个按钮和一个空的framelayout。单击按钮，片段事务将片段加载到空的framelayout中，布局向下滑动。所有这些部件都运行良好。

我现在遇到的问题是： 1.如何检查滑动面板是否已处于活动状态。 2.如何停止面板向上滑动单击同一按钮（如果它已经处于活动状态）。 3.还将片段事务放在按钮的onClick方法内，即使片段处于活动状态，也会重新加载片段。如何阻止这一点。

请问我还是比较新的应用程序开发。我试图解决这个问题但到目前为止还没有取得任何成功。所以任何帮助都会有用。

另外我想知道是否有更好的方法来实现这个滑动面板？谢谢。

这是我的代码：

包含动画的ExpandCollapseAnimation类

public class ExpandCollapseAnimation extends Animation {
private FrameLayout mAnimatedView;
private int mEndHeight;
private int mType;

/**
 * Initializes expand collapse animation, has two types, collapse (1) and expand (0).
 * @param view The view to animate
 * @param duration
 * @param type The type of animation: 0 will expand from gone and 0 size to visible and layout size defined in xml. 
 * 1 will collapse view and set to gone
 */
public ExpandCollapseAnimation(FrameLayout view, int duration, int type) {
    setDuration(duration);
    mAnimatedView = view;
    mEndHeight = mAnimatedView.getLayoutParams().height;
    mType = type;
    if(mType == 0) {
        mAnimatedView.getLayoutParams().height = 0;
        mAnimatedView.setVisibility(View.VISIBLE);
    }
}



@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
    super.applyTransformation(interpolatedTime, t);
    if (interpolatedTime < 1.0f) {
        if(mType == 0) {
            mAnimatedView.getLayoutParams().height = (int) (mEndHeight * interpolatedTime);
        } else {
            mAnimatedView.getLayoutParams().height = mEndHeight - (int) (mEndHeight * interpolatedTime);
        }
            mAnimatedView.requestLayout();
    } else {
        if(mType == 0) {
            mAnimatedView.getLayoutParams().height = mEndHeight;
            mAnimatedView.requestLayout();
        } else {
            mAnimatedView.getLayoutParams().height = 0;
            mAnimatedView.setVisibility(View.GONE);
            mAnimatedView.requestLayout();
            mAnimatedView.getLayoutParams().height = mEndHeight;
        }
    }
  }
}

MainActivity：

   public class MainActivity extends ActionBarActivity {

    private boolean mActive = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        btntap();
        btnTwoTap();


    }




    public void btnTwoTap() {
        Button button2 = (Button) findViewById(R.id.openAnimTwo);
        FrameLayout frameLayout= (FrameLayout) findViewById(R.id.slidin);

        button2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

            FragmentManager fm = getSupportFragmentManager();
            FragmentTransaction ft = fm.beginTransaction();
            Fragment fragmen = new TestFragTwo();
            ft.replace(R.id.slidin, fragmen);
            ft.commit();

            }
        });

    }




    private void btntap() {


        final FrameLayout animatedFrameLayout = (FrameLayout) findViewById(R.id.slidin);

        final Button button = (Button) findViewById(R.id.openAnim);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {




                ExpandCollapseAnimation animation = null;

                if(mActive) {
                    animation = new ExpandCollapseAnimation(animatedFrameLayout, 1500, 1);
                    mActive = false;

                } 
                else if (mActive = false){

                    animation = new ExpandCollapseAnimation(animatedFrameLayout, 0, 1);
                }
                else {
                    animation = new ExpandCollapseAnimation(animatedFrameLayout, 1000, 0);
                    mActive = true;
                }
                animatedFrameLayout.startAnimation(animation);

                //button.setVisibility(View.GONE);


                }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

检查动画滑动面板是否处于活动状态

0 个答案: