Andrid6.0申请SYSTEM_ALERT_WINDOW和WRITE_SETTINGS权限

SYSTEM_ALERT_WINDOW

首先确认app是否拥有该权限，然后再弹出UI申请权限：

public static int OVERLAY_PERMISSION_REQ_CODE = 1234;

public void someMethod() {
    if (!Settings.canDrawOverlays(this)) {
        Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                Uri.parse("package:" + getPackageName()));
        startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE);
    }
}

然后在onActivityResult中检查权限

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == OVERLAY_PERMISSION_REQ_CODE) {
        if (!Settings.canDrawOverlays(this)) {
            // SYSTEM_ALERT_WINDOW permission not granted...
        }
    }
}

WRITE_SETTINGS

判断是否拥有write setting的权限的方法为：

Settings.System.canWrite()

然后打开write setting请求页面的intent为：

ACTION_MANAGE_WRITE_SETTINGS

接下来就和system_alert_window的流程一样