Question

为什么这不起作用？我也修改了Manifest。我没有按照我的编码要求获得许可。它表现得好像我甚至没有请求任何许可。

我已经制作了一个闪屏，我希望它在进入MainActivity之前请求许可。

启动画面应持续1秒。

class SplashActivity : AppCompatActivity() {


var permissionsString = arrayOf(
       Manifest.permission.READ_EXTERNAL_STORAGE,
       Manifest.permission.MODIFY_AUDIO_SETTINGS,
       Manifest.permission.READ_PHONE_STATE,
       Manifest.permission.PROCESS_OUTGOING_CALLS,
       Manifest.permission.RECORD_AUDIO)


override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_splash)


    if (hasPermissions(this@SplashActivity,*permissionsString)){

        ActivityCompat.requestPermissions(this@SplashActivity,permissionsString,131)

    }else{
        Handler().postDelayed({
            val startAct = Intent(this@SplashActivity,MainActivity::class.java)
            startActivity(startAct)
            this.finish()},1000)
    }



}

override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    when(requestCode){
        131 ->{
            if (grantResults.isNotEmpty()
                    && grantResults[0]==PackageManager.PERMISSION_GRANTED
                    && grantResults[1]==PackageManager.PERMISSION_GRANTED
                    && grantResults[2]==PackageManager.PERMISSION_GRANTED
                    && grantResults[3]==PackageManager.PERMISSION_GRANTED
                    && grantResults[4]==PackageManager.PERMISSION_GRANTED){
                Handler().postDelayed({
                    val startAct = Intent(this@SplashActivity,MainActivity::class.java)
                    startActivity(startAct)
                    this.finish()},1000)
            }else{
                Toast.makeText(this@SplashActivity,"Grant it Please",Toast.LENGTH_SHORT).show()
                this.finish()
            }
                return
        }
        else->{
            Toast.makeText(this@SplashActivity,"Something wrong",Toast.LENGTH_SHORT).show()
            this.finish()
            return
        }
    }

}


fun hasPermissions(context: Context,vararg permissions: String): Boolean{
    var hasAllPermissions = true

    for (permission in permissions){
        val res = context.checkCallingOrSelfPermission(permission)
        if (res!=PackageManager.PERMISSION_GRANTED){
            hasAllPermissions = false
        }
    }

    return hasAllPermissions
}

}

Answer 1

检查

targetSdkVersion

项目gradle文件中的

。 <> = 23可以调用运行时权限，否则将自动获得权限。

Answer 2

那是因为你的if condition错了。它应该包括NOT运算符以请求许可，如下所示：

 if (!hasPermissions(this@SplashActivity,*permissionsString)) {

   //Ask for permission
 }

如果您未获得许可，请征得同意。在您的情况下，您正在检查您是否有权限，然后请求许可是错误的。

应用程序在安装时不要求许可

2 个答案: