How to show/hide grouped views in Android?

问题:

I want to create an activity such as mentioned in photo... as soon as I press the maximize button I want it to become full screen for the activity and part 1 become minimize, and again when I press the restore button I want it to become in a first state: to be able to see part 1 and part 2 ...

I think if we put two layouts it is possible? Isn't it? Please refer me to a resource to help me about this, or show me the code to achieve a solution.

回答1:

Part one and two should be in their own layout. After, play with the visilibity property of each layout. Specifically to hide any view without it continues to occupy its space, use the value gone for the visibility property.

Ok, here I go. Below you have a complete example of how to hide/show grouped views.

main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:id="@+id/viewsContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="5dp" >

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextBox One" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="TextBox Two" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="TextBox Three" />
    </LinearLayout>

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="Hide" />

</RelativeLayout>

Activity

public class MyActivity extends Activity implements OnClickListener {

    private boolean viewGroupIsVisible = true;  

    private View mViewGroup;
    private Button mButton;

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

        mViewGroup = findViewById(R.id.viewsContainer);

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


    @Override
    public void onClick(View button) {

    if (viewGroupIsVisible) {
        mViewGroup.setVisibility(View.GONE);
        mButton.setText("Show");
    } else {
        mViewGroup.setVisibility(View.VISIBLE);
        mButton.setText("Hide");
    }

    viewGroupIsVisible = !viewGroupIsVisible;
}

I hope this helps ;)

回答2:

There is a bit simplified solution, than Diego Palomar produced, without using additional variable. I'll take his code to show:

    public class MyActivity extends Activity implements OnClickListener { 

    private View mViewGroup;
    private Button mButton;

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

        mViewGroup = findViewById(R.id.viewsContainer);

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


    @Override
    public void onClick(View button) {

    if (mViewGroup.getVisibility() == View.VISIBLE) {
        mViewGroup.setVisibility(View.GONE);
        mButton.setText("Show");
    } else {
        mViewGroup.setVisibility(View.VISIBLE);
        mButton.setText("Hide");
    }

}