我在我的LinearLayout中有一个Button,一个View和一个ListView。在按钮单击事件我想要视图消失,并且listview被取代它。我试图在动画之后将LayoutParams设置为match_parent dinamically,但它不起作用。有任何想法吗?android listview更改动画后的高度
这里是我的activity_main.xml中:
<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>
这里是我的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) {}
});
}
}
它的工作时,我设置一个特定的整数高度,但我怎么可以这样做match_parent?
解决:
我只有从LinearLayout中这样除去观点:
public void onAnimationEnd(Animator animation) {
parent.removeView(this.v);
lv.setTranslationY(0);
}
谢谢,我试了一下,但它与ClassCastException异常退出,如果我写的'新LinearLayout.LayoutParams( )'它不能再工作:(。 – bendaf