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TouchListener PK OnTouchEvent + multi touch Introduction to this section For example, this section brings you the comparison between TouchListener and OnTouchEvent, as well as the knowledge points of multi touch! TouchListener is based on listening, while OnTouchEvent is based on callback! Here are two simple examples to deepen ...

Several ways of key response onClick binding function for setting keys in 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" android:paddingBottom="@dimen/activity_vertical_ ...

Recently, I sorted out the code of error log capture. Although there are many online, I added some ideas! The following code: import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.os.Build; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputSt ...

Android file system In Android, each application is an independent user. The permission of a file or folder is represented by 10 letters First letter: d stands for folder-Representation file The first group rwx represents the permission of the file owner to the file r:readw:writex:execute The second group rwx refers to the permission ...

1. Preface After the detailed explanation of a total of eight articles in "debugging system applications with Android Studio - TvSettings", I believe you have been able to make most of Android MK control system APK source code, transplanted into a project file that can be compiled and debugged with AS. Taking advantage of the hot ...

Recently, I sorted out and took over the project code, which is useful for NFC function. I took a time to understand it today. It should not be difficult to use it simply. I don't know about advanced extensions. Here's a summary! Knowledge understanding I saw a blog about NFC function on the Internet, which is divided into theory and practice ...

Google launched Navigation mainly to unify the page Jump Behavior in the application. 'androidx.navigation:navigation-fragment:2.1.0' 'androidx.navigation:navigation-ui:2.1.0' 'androidx.navigation:navigation-fragment-ktx:2.1.0' 'androidx.navigation:navigation-ui-ktx:2.1.0' Copy code Add dependency Navigation is easy t ...

Pay attention to my official account: "an an an Android" "learn more knowledge" What is Lifecycle used for Lifecycle is used to store information about the lifecycle state of a component, such as an Activity or Fragment, and to allow other objects to observe this state. More generally, you can get all the life cycle met ...

[original: Style guide] Style guide Java developers who start exploring Groovy can never get rid of the Java way of thinking, which will gradually affect the learning of Groovy. The following features will guide you to improve development efficiency and write more authentic Groovy code. The purpose of this document is to guide such deve ...

Bitmap represents a bitmap, and the picture encapsulated in BitmapDrawable is a bitmap object. In order to encapsulate a bitmap object into a BitmapDrawable object, developers can call the constructor of BitmapDrawable: ／／Put one Bitmap Object packaging BitmapDrawable object val drawable = BitmapDrawable(bitmap) If you need to get the bitma ...