Tag: android

The BottomNavigationView is not displayed as full width because it is not supposed to.
If you want to fill the space behind the BottomNavigationView, you can set the background color of the view to be the same color as the items background:

<android.support.design.widget.BottomNavigationView
     android:background="@color/bottom_view_color"
     app:itemBackground="@color/bottom_view_color"

     // .... />

References
http://stackoverflow.com/questions/41432902/bottomnavigationview-is-not-full-width/

@Override
public void setUserVisibleHint(boolean visible)
{
    super.setUserVisibleHint(visible);
    if (visible && isResumed())
    {
        //Only manually call onResume if fragment is already visible
        //Otherwise allow natural fragment lifecycle to call onResume
        onResume();
    }
}

@Override
public void onResume()
{
    super.onResume();
    if (!getUserVisibleHint())
    {
        return;
    }

    //INSERT CUSTOM CODE HERE
}

References
http://stackoverflow.com/questions/10024739/how-to-determine-when-fragment-becomes-visible-in-viewpager
https://developer.android.com/reference/android/app/Fragment.html#setUserVisibleHint(boolean)
https://developer.android.com/reference/android/app/Fragment.html#setMenuVisibility(boolean)

Invalidate the whole view. If the view is visible, onDraw(android.graphics.Canvas) will be called at some point in the future.

This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().

gauge.invalidate();

References
https://developer.android.com/reference/android/view/View.html#invalidate()
http://stackoverflow.com/questions/10647558/when-its-necessary-to-execute-invalidate-on-a-view

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;

In a view you need to do something like this:

((Activity) getContext()).getWindowManager()
                         .getDefaultDisplay()
                         .getMetrics(displayMetrics);

Or

public static int getScreenWidth() {
    return Resources.getSystem().getDisplayMetrics().widthPixels;
}

public static int getScreenHeight() {
    return Resources.getSystem().getDisplayMetrics().heightPixels;
}

References
http://stackoverflow.com/questions/4743116/get-screen-width-and-height

build.gradle

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'

    compile 'com.android.support:percent:25.3.1'
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.percent.PercentRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="ir.mhdr.a081.MainActivity">

    <View android:background="@color/colorPrimary"
        app:layout_heightPercent="50%"
        app:layout_marginLeftPercent="25%"
        app:layout_marginTopPercent="25%"
        app:layout_widthPercent="50%"
        android:id="@+id/viewColor">

    </View>

    <android.support.percent.PercentFrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/viewColor"
        android:layout_centerInParent="true"
        android:layout_alignParentBottom="true">

        <View
            android:layout_gravity="center"
            android:background="@color/colorAccent"
            app:layout_heightPercent="30%"
            app:layout_widthPercent="50%" />
    </android.support.percent.PercentFrameLayout>

</android.support.percent.PercentRelativeLayout>

References
https://github.com/mhdr/AndroidSamples/tree/master/081
https://developer.android.com/reference/android/support/percent/PercentRelativeLayout.html
https://developer.android.com/reference/android/support/percent/PercentFrameLayout.html
https://developer.android.com/topic/libraries/support-library/packages.html

root build.gradle

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

build.gradle

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.github.Paroca72:sc-widgets:2.1.2'
    testCompile 'junit:junit:4.12'

}

References
https://github.com/mhdr/AndroidSamples/tree/master/080

/res/drawable/gradient_color.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >

    <gradient
        android:angle="135"
        android:startColor="@color/colorBackground"
        android:endColor="@color/colorPrimary"
        android:type="linear" />

    <corners
        android:radius="0dp"/>

</shape>

activity_main.xml

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/editTextWeight"
                android:background="@drawable/gradient_color">
                <Button
                    android:id="@+id/buttonStart"
                    android:background="?android:attr/selectableItemBackground"
                    android:textAllCaps="true"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="@string/start"
                    />
            </FrameLayout>

References
https://github.com/mhdr/AndroidSamples/tree/master/077

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextGoesHere"
style="?android:attr/borderlessButtonStyle"
/>

References
https://github.com/mhdr/AndroidSamples/tree/master/076

activity_main.xml

            <TextView
                android:id="@+id/textViewProfileName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_alignParentRight="true"
                android:layout_below="@+id/textViewFirstRunHeader2"
                android:focusable="true"
                android:focusableInTouchMode="true"
                android:gravity="center|start"
                android:text="@string/profile_name"
                android:textColor="@android:color/black"
                android:textSize="16sp"
                android:textStyle="bold" />

MainActivity.java

        textViewProfileName= (TextView) findViewById(R.id.textViewProfileName);
        textViewProfileName.requestFocusFromTouch();

References
https://github.com/mhdr/AndroidSamples/tree/master/075

        <Button
            android:id="@+id/buttonSaveHeight"
            android:layout_marginTop="20dp"
            android:layout_marginBottom="10dp"
            android:text="@string/ok"
            android:gravity="center"
            android:layout_gravity="center"
            android:background="@android:color/transparent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

References
https://github.com/mhdr/AndroidSamples/tree/master/074