android listview在动画后改变高度

时间:2014-04-18 23:31:22

标签: android android-layout listview layoutparams

我的LinearLayout中有一个Button,一个View和一个ListView。在按钮单击事件上,我希望视图消失,列表视图取代它。我试图在动画之后将LayoutParams设置为match_parent dinamically,但它不起作用。有什么想法吗?

这是我的activity_main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/container"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context="com.example.linearlayouttry.MainActivity" >

 <Button android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Start"/>

 <View android:id="@+id/view"
    android:layout_width="fill_parent"
    android:background="@android:color/black"
    android:layout_height="300dp"/>

 <ListView android:id="@+id/listv"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

 </ListView>

</LinearLayout>

这是我的MainActivity.java:

public class MainActivity extends Activity implements OnClickListener {

protected View v;
protected ListView lv;

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

    ArrayList<String> list = new ArrayList<String>(Arrays.asList("1","2","3","4","5","6","7","8","9","10"));
    lv = (ListView) findViewById(R.id.listv);
    lv.setAdapter(new ArrayAdapter<>(getApplicationContext(), android.R.layout.simple_list_item_1, list));

    Button mButton = (Button) findViewById(R.id.button);
    mButton.setOnClickListener(this);

    v = findViewById(R.id.view);
}

@Override
public void onClick(View v) {
    this.v.setAlpha(0);
    int height = this.v.getLayoutParams().height;
    lv.animate().translationY(-height).setListener(new AnimatorListener() {
        public void onAnimationStart(Animator animation) {}
        public void onAnimationRepeat(Animator animation) {}

        @Override
        public void onAnimationEnd(Animator animation) {
            lv.getLayoutParams().height=LayoutParams.MATCH_PARENT;
            lv.requestLayout();
        }

        public void onAnimationCancel(Animator animation) {}
    });
}
}

当我将特定整数设置为高度时,它正在工作,但我怎样才能使用match_parent?

解决:

我只需要从linearlayout中删除视图,如下所示:

public void onAnimationEnd(Animator animation) {
            parent.removeView(this.v);
            lv.setTranslationY(0);
}

3 个答案:

答案 0 :(得分:1)

尝试

lv.setLayoutParams(new LayoutParams(widthValue, LayoutParams.MATCH_PARENT));

而不是

lv.getLayoutParams().height=LayoutParams.MATCH_PARENT;
lv.requestLayout();

可以找到有关LayoutParams类的更多信息here

答案 1 :(得分:1)

感谢您的回答,我解决了这个问题,从如下的线性布局中删除了视图:

public void onAnimationEnd(Animator animation) {
            parent.removeView(this.v);
            lv.setTranslationY(0);
}

答案 2 :(得分:0)

或者,

public void onAnimationEnd(Animator animation) {
     this.v.setVisibility(View.GONE);
     lv.setTranslationY(0);
}