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我要为相对布局背景设置图像。为了支持所有的屏幕尺寸(从小到大),它的分辨率应该设置多大/小?
将背景图像放在所有可绘制文件夹中
xhdpi 960x720 hdpi 640x480 mdpi 470x320 ldpi 320x240