【发布时间】:2018-09-02 18:49:05
【问题描述】:
我的 LinearLayout 中有一个 Button、一个 View 和一个 ListView。在按钮单击事件上,我希望视图消失并且列表视图取而代之。我试图在动画之后将 LayoutParams 设置为 match_parent,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会起作用,但我如何使用 match_parent 来做到这一点?
已解决:
我只需要像这样从线性布局中删除视图:
public void onAnimationEnd(Animator animation) {
parent.removeView(this.v);
lv.setTranslationY(0);
}
【问题讨论】:
-
即使隐藏另一个视图也足够好了,比如 this.v.setVisibility(View.GONE)
标签: android android-layout listview layoutparams