How to Add a SensorEventListener
SensorEventListener was added in API Level 3Used for receiving notifications from the SensorManager when sensor values have changed.1. In the MainActivity.java file, add the lines below to the import...
View ArticleHow to Register a SensorEventListener
public boolean registerListener (SensorEventListener listener, Sensor sensor, int rateUs) was added in API level 3Registers a SensorEventListener for the given sensor.Note: Don't use this method with a...
View ArticleHow to Determine if Sensor Light Changed
Added in API Level 3Sensor.TYPE_LIGHT:values[0]: Ambient light level in SI lux units1. Register a SensorEventListener named mySensorEventListener. 2. In the method named onSensorChanged in the...
View ArticleHow to Set ProgressBar Progress on Light Sensor Change
API Level 3 or greater needed.1. Set the Upper Range of a ProgressBar to the Maximum Range of a Light Sensor named myProgressBar.2. Determine if Sensor Light Changed3. In the onSensorChanged method,...
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How to Change the ProgressBar to a Horizontal Progress Bar
By default, the progress bar is a spinning wheel (an indeterminate indicator). To change to a horizontal progress bar, apply one of the styles below.1. Add a ProgressBar, in XML.2. Add the below style...
View Articleandroid:max - How to Set the Maximum Value for a ProgressBar, in XML
public static final int max was added in API level 1Defines the maximum value the progress can take.Must be an integer value, such as "100".By default, the progress bar is full when it reaches 100, a...
View Articleandroid:progress - How to Set the Default Progress Value of a ProgressBar
public static final int progress was added in API level 1Defines the default progress value, between 0 and max.Must be an integer value, such as "50".1. Add a ProgressBar, in XML2. Add the below line...
View Articleandroid:padding - How to Set the Padding on a ProgressBar
android:padding was added in API Level 1Sets the padding, in pixels, of all four edges. Padding is defined as space between the edges of the view and the view's content. A view size will include it's...
View ArticleHow to Hide/Remove ActionBar from an Activity
1. In the AndroidManifest.xml, add the below line between the activity tags.<activity android:name="MyActivity"android:theme="@android:style/Theme.NoTitleBar.Fullscreen"....> 2. Compile and...
View ArticleHow to Center a TextView within a RelativeLayout
android:layout_centerInParent This only works in Relativelayout View. It does not work in LinearLayout.If true, centers this child horizontally and vertically within its parent.1. In your main.xml...
View ArticleHow to Align an EditText to the Bottom in a View
android:layout_alignBottom was added in API Level 1Makes the bottom edge of this view match the bottom edge of the given anchor view ID. Accommodates bottom margin.1. In your main.xml file, add a...
View ArticleHow to Align an ImageView to the Right in a View
android:layout_alignParentRight was added in API Level 1If true, makes the right edge of this view match the right edge of the parent. Accommodates right margin.Must be a boolean value, either "true"...
View ArticleHow to Close an Activity
public void finish () was added in API level 1Call this when your activity is done and should be closed. The ActivityResult is propagated back to whoever launched you via onActivityResult().In this...
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How to Add Rating Bar, in XML
RatingBar was added in API Level 1A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. The user can touch/drag or use arrow keys to set the rating when using the default...
View Articleandroid:id - How to Name a Rating Bar, in XML
android:id was added in API Level 1This is a unique identifier name for the RatingBar so you can refer to the RatingBar later in your project.1. Add a Rating Bar in your main.xml file.2. In the...
View ArticleHow to Declare a RatingBar
RatingBar was added in API Level 1A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. The user can touch/drag or use arrow keys to set the rating when using the default...
View ArticlefindViewbyID - How to Find a RatingBar using ID
findViewbyId was added in API Level 1findViewById: Look for a child RatingBar with the given id. If this view has a given id, return this RatingBar. The findViewById() method is available to all...
View ArticleString.valueOf - How to Convert a Double to a String
public static String valueOf (int value) was added in API level 1Converts the specified double to its string representation.Parameters: value - the double.Returns: the double converted to a string(** I...
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How to Set Permission for I/O Operations over NFC
public static final String NFC was added in API level 9Allows applications to perform I/O operations over NFC1. In the AndroidManifest.xml file, and add the following line Add the line between the...
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How to Register an Activity that Responds to NFC tags for URI's that point to...
This will register an Activity that will respond only to NFC tags that correspond to a URI that points a website (URL).ACTION_NDEF_DISCOVERED(added in API level 10) is an Intent to start an activity...
View ArticleHow to Install an SDK package
1. Open the SDK Manager2. Scroll through the list, expanding folders when necessary and check the item(s) you would like to install.3. Click Install packages... button.
View ArticleHow to Import a Library
1. In Eclipse, from the menu, click File, the Import...2. Expand the Android folder, and select Existing Android Code Into Workspace, and click Next.3. Click the Browse button, then navigate to your...
View ArticleHow to Reference a Library in your Project
1. Create or open your Android project.2. Ensure the Google Play services SDK is installed. It is located in the last folder called Extras.3. Import the Google Play services library.4. In the Package...
View ArticleHow to Create a ProGuard Exception
This prevents ProGuard from stripping away required classes.1. In your project directory, open the proguard-project.txt file.2. Add the following code to the end of the file.-keep class * extends...
View ArticleSolution: Running Android Lint has encountered a problem Failed
Problem:'Running Android Link' has encountered a problem.Failedjava.lang.NullPointerExceptionOK <<DetailsSolution:1. In Visual Studio, from the menu bar, click Window, then Preferences.2....
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