A collection of basic Android skills...

• Create "ringtones" "alarms" "notifications" and other folders in sdcard, and then store the ringtone files (Ogg, MP3, WAV, mid, and so on, the system selects the ringtone option to add these music files.There are many ways to set ringtones for Android phones, but the most common method is to set several folders with specific names on the SD card, and then place the ringtone file in the folder, then, you can view and select the ringtone in the SD card by using the built-in ringtone setting method. Many netizens have said that this method cannot be used normally. After you place ringtones, you cannot read these ringtones. What's going on? How can this problem be solved? In fact, there are multiple causes for this. You can analyze the causes and solutions. The first reason is that the ringtone format is not supported. Currently, the Android operating system only supports audio in MP3 and WMA formats. Therefore, audio in other formats must be converted to these two formats before being read. The second step is to set an incorrect folder name, which must be read. The folder names set here are "notifications" and "ringtones", which must be lowercase letters. Then there is a card problem. Some storage cards have quality problems and the stored files will be lost automatically. Finally, there is a problem with the Rom version of the mobile phone. Some user-made Rom versions have not been optimized for reading the SD card, therefore, after selecting the ringtone selection interface, you need to wait for a while before it will appear in the ringtone selection menu of the Android system.
• Adjust the volume to a minimum, and then switch to the vibration mode and mute the phone tone.
• Long press the host key and choose flight mode, mute mode, and shutdown from the pop-up advanced menu. However, it is worth mentioning that the mute room here is completely muted, and there is no sound in the music box game.
• So how can we enter the engineering model of the system? In fact, it is very simple. You don't need to press any combination of buttons at the same time. Instead, you can dial on the dialing interface. Click "dialer" on the main screen of the system to enter the dialing interface. Enter "* #* #4636 # *" (without quotation marks) to enter the project testing mode. The testing interface is displayed, which includes four options: phoneinformation, batteryinformation, batteryhistory, and usagestatistics. For example, to viewProgramClick usagestatistics in the previous running time to enter its category. Select usagetime as the sortby parameter. The list information listed below is the historical running time of each process.
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