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scene Click the button in Android to start another Activity and transfer values between activities: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103919470 How to get the return value of Acitvity after launching Activity and Value Transfer above.The following example implements clicking the Select Avatar button, jumping to the avata ...

Personal blog http://www.milovetingting.cn Working process of four major components Four components: Activity, Service, BroadcastReceiver, ContentProvider Operation status of four major components In addition to the BroadcastReceiver, the other three components of Android must be registered in the Android manifest. For BroadcastReceiver, y ...

In this paper, the main line is to start the machine and show the PIN code unlocking interface for the first time. It introduces the organizational structure of KeyguardService and analyzes the presenting process of the password unlocking interface. 1, Boot to PhoneWindowManager Start the init - > zygote - > systemserve ...

0x1. Open AS to create an empty project without interface, and then add the following code to the manifest file: <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" > <!-- send xposed ...

First on the renderings In fact, the implementation is very simple, that is, various calls of WiFi manager. Here are some precautions and steps Jurisdiction <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /> < ...

Content provider (1) Next, we will introduce the content resolver, one of the four components of Android The content provider is the external access interface provided by Android internal program, which can share data. Requirements: obtain the address book information through the content provider, and display it in your own ...

System adaptation of Android heterogeneous models: the app name defined by application is not consistent with the name displayed on the desktop after it is installed on the mobile phone This kind of situation will appear on some domestic bizarre customized Android models. Normally, the name of the android App displayed under t ...

We've seen QR code before. There's no nonsense here. We'll go to dry goods directly. step Import dependency compile 'com.google.zxing:core:3.2.1' //zxing core dependency compile 'com.journeyapps:zxing-android-embedded:3.3.0' //Generate QR code dependency 1 2 Generate QR code Here, a ZxingUtils is encapsu ...

During the production of mobile phones, each mobile phone has a unique ID, and international mobile equipment identity (IMEI) is adopted internationally. IMEI is an "electronic serial number" composed of 15 digits. It corresponds to each mobile phone one by one, and the code is unique in the world. After assembly, eac ...

Related knowledge NotificationCompat.Builder upgrade to Android O version creation method setContentTitle set title setContentText setting content setSubText set small words below content setWhen set notification time setLargIcon set large icon Setsmalleicon sets the small iconlarge iconlarge iconlarge iconlarge iconlarg ...