Reputation: 2927

how to make the textview visible in button click event in android

I developed one Simple app, which contains one textview.and my problem is that I want visible in invisible this text view on button click event.

At loadtime I do this

myTextView.setVisible(View.GONE);

and after this at Button Click event, I do this.

myTextView.setVisible(View.VISIBLE);

The textview is visible but it is overlap on below TextView means myTextView cannot contain space. So what can I do now?

Upvotes: 1

Answers (5)

Martins Agbim

Reputation: 1

This will show and hide the text(s) when the corresponding buttons are pressed. Very useful if you want to control multiple text with buttons

1)XML File:

                    <LinearLayout
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:orientation="vertical"
                    android:gravity="center_vertical">
                    <TableRow
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center" >
                    <Button
                        android:text="The Origin"
                        android:id="@+id/btnOrigin"
                        android:onClick="buttonOnClick"/>
                    </TableRow>
                    <TableRow
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center" >
                        <TextView
                            android:id="@+id/txtOrigin"
                            android:layout_width="fill_parent"
                            android:layout_height="wrap_content"
                            android:text="@string/about"
                            android:textColor="#000"
                            android:textSize="@dimen/text_body"
                            android:gravity="center_vertical"
                            android:layout_marginLeft="10dp"
                            android:layout_marginRight="10dp"
                            android:visibility="gone"/>
                    </TableRow>
                </LinearLayout>
                <LinearLayout
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:orientation="vertical"
                    android:gravity="center_vertical">
                    <TableRow
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center" >
                        <Button
                            android:text="Vision"
                            android:id="@+id/btnVision"
                            android:onClick="buttonOnClick"/>
                    </TableRow>
                    <TableRow
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center" >

                        <TextView
                            android:id="@+id/txtVision"
                            android:layout_width="fill_parent"
                            android:layout_height="wrap_content"
                            android:text="@string/vision"
                            android:textColor="#000"
                            android:textSize="@dimen/text_body"
                            android:gravity="center_vertical"
                            android:layout_marginLeft="10dp"
                            android:layout_marginRight="10dp"
                            android:visibility="gone"/>
                    </TableRow>
                </LinearLayout>

2) JAVA code

        private TextView txtOrigin, txtVision;


        public void buttonOnClick(View view) {
        switch (view.getId()) {
            case R.id.btnOrigin:
                txtOrigin = (TextView) findViewById(R.id.txtOrigin);
                txtOrigin.setVisibility(View.VISIBLE);
                txtVision = (TextView) findViewById(R.id.txtVision);
                txtVision.setVisibility(View.INVISIBLE);
                break;
             case R.id.btnVision:
                txtVision = (TextView) findViewById(R.id.txtVision);
                txtVision.setVisibility(View.VISIBLE);
                txtOrigin = (TextView) findViewById(R.id.txtOrigin);
                txtOrigin.setVisibility(View.INVISIBLE);
                break;
                }
             }

Upvotes: 0

Swayam

Reputation: 16354

A slight change in your code should make it work fine I believe.

myTextView.setVisibility(View.INVISIBLE);

and after the button click,

myTextView.setVisibility(View.VISIBLE);

For doing it in the java code, have a go at this(haven't tried it out myself though)...

RelativeLayout rl = new RelativeLayout(this);
ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.xxx);
TextView txt = new TextView(this);
txt.setText("XXX");
rl.addView(iv,0);
rl.addView(txt,1);

Upvotes: 0

Arie

Reputation: 5373

try this:

RelativeLayout layout = new RelativeLayout(this);
TextView tv1 = new TextView(this);
tv1.setText("A");
tv1.setId(1); 

TextView tv2 = new TextView(this);
tv2.setText("B");
tv2.setId(2);

RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
        RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.FILL_PARENT);
lp.addRule(RelativeLayout.BELOW, tv1.getId());

layout.addView(tv1);        
layout.addView(tv2, lp);

and when you change visibility, call invalidate() on parent view of myTextView (layout here) or root view of your layout ( layout.getRootView() )

Upvotes: 0