The role of displayinfo in java

The displayInfo method in Java is used to obtain detailed information about the display information of the Android device, including width, height, refresh rate, density, direction and density type, which can be used to adjust layout, optimize image and text size, and process the screen Orientation changes.

The purpose of displayInfo in Java

The displayInfo method is a low-level function in Java, mainly used to obtain information about Details of the information displayed by Android devices.

Detailed description

This method returns a DisplayInfo object containing the following details:

• Device display width (pixels ): The number of horizontal pixels of the display.
• Device display height (pixels): The number of vertical pixels of the display.
• Device display refresh rate (Hz): The number of times the display refreshes images per second.
• Device display density (pixels per inch): The density of pixels on the screen, which determines the sharpness of the image.
• Device display orientation: The orientation of the current screen (for example, portrait or landscape).
• Device display density type: Indicates the resolution type displayed by the device.

The displayInfo method is useful for:

• Adjusting the layout on different devices: Getting device display information helps target different screen sizes and resolution-optimized application layouts.
• Optimize image and text size: Display density determines the optimal size for images and text to ensure they are clearly visible on different devices.
• Handling screen orientation changes: By listening for device orientation changes and adjusting layout accordingly, applications can provide a smooth user experience.

Get display information

To use the displayInfo method to obtain display information, you can perform the following steps:

1. Get the Display object: Display display = getWindowManager().getDefaultDisplay();
2. Call the displayInfo method: DisplayInfo displayInfo = new DisplayInfo(); display.getDisplayInfo(displayInfo);
3. Get the required information from the displayInfo object.

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