Question

I’m new to android development(v 4.0, API 14) and stuck in implementing orientation change.

I’ve added the following line in manifest file
android:configChanges="orientation|keyboardHidden|screenSize">

But it looks like screenSize parameter is not working so I have to manually write these two methods:

public void ChangetoLandscape() {
    ed.setTranslationX(300.0f);
    btnindex.setTranslationX(300.0f);
    btngainer.setTranslationX(300.0f);
    btnloser.setTranslationX(300.0f);
    lsym.setTranslationX(200.0f);
    ltable.setTranslationX(300.0f);
    tv1.setTranslationX(290.0f);
    tv2.setTranslationX(300.0f);
    tv4.setTranslationX(300.0f);

    mySimpleXYPlot.setScaleX(3.0f);
    mySimpleXYPlot.setScaleY(0.8f);
    mySimpleXYPlot.setPlotMarginLeft(50.0f);
    mySimpleXYPlot.setTranslationX(60.0f);
    mySimpleXYPlot.setTranslationY(-70.0f);

    sv1.setTranslationY(-80.0f);
}

public void ChangetoPortrait() {

//NOTE THAT IF I DON'T WRITE BELOW CODE,
//SWITCHING TO PORTRAIT MODE AFTER LANDSCAPE MODE RUINS THE WHOLE LAYOUT.
        ed.setTranslationX(-1.0f);
        btnindex.setTranslationX(-1.0f);
        btngainer.setTranslationX(-1.0f);
        btnloser.setTranslationX(-1.0f);
        lsym.setTranslationX(-1.0f);
        ltable.setTranslationX(-1.0f);
        tv1.setTranslationX(-1.0f);
        tv2.setTranslationX(-1.0f);
        tv4.setTranslationX(-1.0f);
        mySimpleXYPlot.setScaleX(1.0f);
        mySimpleXYPlot.setScaleY(1.0f);
        mySimpleXYPlot.setPlotMarginLeft(1.0f);
        mySimpleXYPlot.setTranslationX(-1.0f);
        mySimpleXYPlot.setTranslationY(-1.0f);

        sv1.setTranslationY(-1.0f);
}

.

I’m using RelativeLayout, so I’ve to manually translate each view to specified position on orientation change.

main.xml

<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical"
android:id="@+id/MainLayout">"
<EditText
    android:id="@+id/txt1"
    android:layout_width="100dp"
    android:layout_height="wrap_content"
    android:hint="Search"
    android:layout_marginLeft="220dp"
    android:selectAllOnFocus="true"
    android:cursorVisible="false" >
</EditText>

<Button
    android:id="@+id/btnindex"
    android:layout_width="60dp"
    android:layout_height="wrap_content"
    android:text="Index" 
    android:layout_marginLeft="140dp"
    android:layout_below="@id/txt1"
    android:textSize="12dp"/>

<Button
    android:id="@+id/btngainer"
    android:layout_width="60dp"
    android:layout_height="wrap_content"
    android:text="Gainer" 
    android:layout_below="@id/txt1"
    android:layout_toRightOf="@id/btnindex"
    android:textSize="12dp"/>

<Button
    android:id="@+id/btnloser"
    android:layout_width="60dp"
    android:layout_height="wrap_content"
    android:text="Loser" 
    android:layout_below="@id/txt1"
    android:layout_toRightOf="@id/btngainer"
    android:textSize="12dp"/>

<TextView
    android:id="@+id/tv1"
    android:layout_width="75dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="150dp"
    android:layout_marginTop="100dp"
    android:textStyle="bold"
    android:gravity="center"
    android:textSize="10dp"
    android:textColor="#00ff00"
    android:text="SYMBOL"/> <!-- 2 similar textviews -->

<ListView
        android:id="@+id/ltable"
        android:layout_height="wrap_content"
        android:layout_marginLeft="150dp"
        android:layout_marginTop="70dp"
        android:layout_alignParentRight="true"
        android:layout_width="match_parent"
        android:layout_below="@id/txt1">
</ListView>
    
<com.androidplot.xy.XYPlot
android:id="@+id/mySimpleXYPlot"
android:layout_width="140dp"
android:layout_height="200dp"
android:layout_alignTop="@+id/btnindex"
title="Index"/>

<ScrollView android:id="@+id/sv1"
android:layout_width="300dp"
android:layout_height="100dp"
android:layout_marginTop="250dp">

<LinearLayout android:id="@+id/LinearLayout02"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:orientation="vertical">

<TextView android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tv1"
android:text="Scrollview Item 1"/> <!-- 5 similar textviews -->
</LinearLayout>
</ScrollView>

</RelativeLayout>

.

1. But as showed in below screenshot, in landscape mode, graph which is plotted using android plot is not getting properly displayed. The reason behind this is I’ve used setScaleX() method bcoz setWidth() is not available. I don’t want graph to look stretched. Instead it’s width should be increased.

2. ScrollView is getting displayed properly in portrait mode but in landscape mode, it is not visivle according to it’s height which is 100dp.

---

Edit: After changing android:configChanges="orientation|keyboardHidden|screenSize" to
android:configChanges="orientation|screenSize",
I get this when I switch to landscape mode:

Answer 1

use LayoutParams to place the graph at appropriate location instead of scale() function.