Scroller 界面滑动

Scroller 滑动之后滑动器子标签里面的控件,其自身是不动的.这里点在下面的进阶会体现出来.

 1. 继承LinearLayout, 相对布局也可以.

public class MyLinearLayout extends LinearLayout {

   private Scroller scroller;

    public MyLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        scroller = new Scroller(context);
    }

    public void startScroll(int startX, int startY, int dx, int dy, int duration) {
        if (!scroller.isFinished()) scroller.abortAnimation();
        scroller.startScroll(startX, startY, dx, dy, duration);
        invalidate();
    }

    @Override
    public void computeScroll() {
        Log.d("cece", this.toString() + " computeScroll-----------");
        if (scroller.computeScrollOffset()) {
            scrollTo(scroller.getCurrX(), scroller.getCurrY());
            postInvalidate();
        }
    }
}

2. 主界面

public class MyActivity extends Activity implements View.OnClickListener {

    private static final String TAG = "MyActivity";
    private Button button;
    private MyLinearLayout linearLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        button = (Button) findViewById(R.id.button);
       // imageView = (ImageView) findViewById(R.id.iv);
        linearLayout = (MyLinearLayout) findViewById(R.id.rl);

        button.setOnClickListener(this);
        findViewById(R.id.button2).setOnClickListener(this);
    }

    /**
     * Called when a view has been clicked.
     *
     * @param v The view that was clicked.
     */
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button:
                int x = linearLayout.getScrollX();
                int y = linearLayout.getScrollY();
                linearLayout.startScroll(x, y, 0, 100, 1000);
                break;
            case R.id.button2:
                 x = linearLayout.getScrollX();
                 y = linearLayout.getScrollY();
                Log.d(TAG, "x:"+x+" y:"+y);
                linearLayout.startScroll(x, y, 0, -100, 1000);
                break;
        }
    }
}

3. 资源文件

<com.bytereal.luv.myapplication.MyLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button1" />
    <!--   android:layout_alignParentBottom="true"
              android:layout_alignParentEnd="true"-->

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button2" />
    <!-- android:layout_alignTop="@+id/button"
      android:layout_toStartOf="@+id/button"-->
</com.bytereal.luv.myapplication.MyLinearLayout>

来自为知笔记(Wiz)