Android开发之API29以上 无法访问解决

安卓11授权修改如下：

添加新的权限

<!--    安卓11下载读写内存权限-->
    <uses-permission android:name=".MANAGE_EXTERNAL_STORAGE"/>

修改代码

filePath = (Environment.DIRECTORY_DOWNLOADS) + filePath;

import ;
import ;
import ;
import ;

import ;
import ;

@SuppressWarnings("deprecation")
@SuppressLint({ "DefaultLocale", "SimpleDateFormat" })
public class Function_Utility {

	private static Context mAppContext;

	public static void setAppContext(Context context) {
		mAppContext = context;
	}

	public static Context getAppContext() {
		return mAppContext;
	}

	/**
	 * 获取下载路径
	 */
	public static String getUpgradePath() {
		String filePath = getAppRootPath() + "";
		File file = new File(filePath);
		if (!()) {
			();
		}
		file = null;
		return filePath;
	}

	public static String getAppRootPath() {
		String filePath = "/downloads";
		if (().equals(Environment.MEDIA_MOUNTED)) {
			filePath = (Environment.DIRECTORY_DOWNLOADS) + filePath;
		} else {
			filePath = getAppContext().getCacheDir() + filePath;
		}
		File file = new File(filePath);
		if (!()) {
			();
		}
		file = null;
		File nomedia = new File(filePath + "/.nomedia");
		if (!())
			try {
				();
			} catch (IOException e) {
				();
			}
		return filePath;
	}
}

除了安卓6.0的动态授权外，还需要读写权限做授权

if (.SDK_INT >= Build.VERSION_CODES.R ) {// android 11  且 不是已经被拒绝
			// 先判断有没有权限
			if (!()) {
				Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
				(("package:" + getPackageName()));
				startActivityForResult(intent, 1024);
			}
		}

@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		(requestCode, resultCode, data);
		if (requestCode == 1024 && .SDK_INT >= Build.VERSION_CODES.R) {
			// 检查是否有权限
			if (()) {
				isRefuse = false;
				// 授权成功
				(,"权限授权成功");
			} else {
				isRefuse = true;
				// 授权失败
				(,"获取权限失败，可能APP更新、下载图片等部分功能无法正常使用，请手动开启");
			}
		}
	}