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scene The pitfalls that novices encounter when Android studio runs its first App: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103797243 Use relative layout RelativeLayout to implement a simple layout of login prompts. The effect is as follows     Note: Blog: https://blog.csdn.net/badao_liumang_qizhi Pay attention to the public ...

Reference blog: Android native volume control Reference blog: In depth understanding AudioService 1, Problem description When the USB headset is not connected, the system volume can be set to the maximum value of 15. When the USB headset is connected, the system volume can only be set to 4 1, Cause analysis (1) Android aud ...

[overview] there are quite a lot of problems in the use of Golder at the beginning. Combined with some cases on the Internet, some summaries are made. [simple process] 1. Get key - > 2. Configure Android Studio - > 3. Use [step 1] get the key Address: https://lbs.amap.com/dev/key/app ① Get SHA1 and follow the docu ...

1. overview All file paths in the Andorid system are saved in a database, which is located in external.db under the folder data/data/com.android.providers.media The files table inside has what we need. This table contains all the files of the machine. Next, just select the appropriate sql statement to get what we need. 2. im ...

I found some examples on the Internet, but I can't run them after testing. Here is an example of openc that can run after passing the test in msm8953. Of course, this example is also modified on the basis of others. The specific code is as follows 1.Android.mk Code path : vendor/qcom/proprietary/mm-camera/mm-camera2/opencl/And ...

Android RSA asymmetric encryption What is Rsa encryption RSA algorithm is the most popular public key cryptography algorithm, which uses keys with variable length. RSA is the first algorithm that can be used for both data encryption and digital signature. The principle of RSA algorithm is as follows: 1. Randomly select t ...

Reprint by jqorz Source: https://blog.csdn.net/baidu_27419681/article/details/81587232 Originally, I have sorted out a method for Android to encrypt files using AES. See AES encryption / decryption available on Android has been directly encapsulated as file encryption , but when it is used recently, it is found that the ...

Share a circular progress bar for your reference, project address https://download.csdn.net/download/weixin_40998254/10595267 The effect is as follows The following is the code of the custom progress bar. It is a simple version at present, but the comments are very detailed and easy to expand. The first is the code of cus ...

Preparatory work: before use, you need to apply for API Key on Baidu developer platform, which is not covered here. You can query the article by yourself. 1, Modify the AndroidManifest.xml file to add permissions and API keys. The following are permissions needed (the annotation part is because the project has been added befor ...

Simple Theme skin changing function Effect screenshots 1. Defining properties First define several attributes that need to be changed, for example: <!--Skin peeler--> <attr name="userNameColor" format="color" /> <attr name="commonColor" format="color" /> <attr name="bgColor" format="color" ...