Question

我试着打电话给Kotlin，就像这样：

 imgPhone.setOnClick {
            val intent = Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "1122334455"))
            startActivity(intent)
        }

单击手机图像时，没有任何外观。原来调试器显示了这个：

java.lang.SecurityException：Permission Denial：启动Intent { act = android.intent.action.CALL dat = tel：xxxxxxxxxx cmp = com.android.server.telecom / .components.UserCallActivity}

我尝试了几种解决方案：

将此行放在AndroidManifest.xml中：

＆LT; uses-permission android：name =“android.permission.CALL_PHONE”/＆gt;

在呼叫意图为的活动中添加 android：exported =“true” 调用

< activity android:name=".activities.ProfileActivity" android:exported="true"/>

明确询问权限：

override fun onCreate() {
super.onCreate()
/*
more codes here
*/
setupPermissions()
 }

fun setupPermissions() {
val permission = ContextCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE)

    if (permission != PackageManager.PERMISSION_GRANTED) {
    Log.i("Error", "Permission to call denied")
    }
}

到目前为止，这些解决方法都不起作用（在Android 6上）。仍然会发生相同的SecurityException。那么什么是正确的解决方案呢？

Answer 1

在Marshmallow中，您必须在运行时请求权限，仅在清单中是不够的。在你写的选项（3）上你几乎做到了。在那里你只是在检查许可，但没有要求它。

官方文档是：https://developer.android.com/training/permissions/requesting

代码将与此类似：

fun checkPermission() {
   if (ContextCompat.checkSelfPermission(this,
           Manifest.permission.CALL_PHONE)
           != PackageManager.PERMISSION_GRANTED) {

       // Permission is not granted
       // Should we show an explanation?
       if (ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.CALL_PHONE)) {
           // Show an explanation to the user *asynchronously* -- don't block
           // this thread waiting for the user's response! After the user
           // sees the explanation, try again to request the permission.
       } else {
           // No explanation needed, we can request the permission.
           ActivityCompat.requestPermissions(this,
                   arrayOf(Manifest.permission.CALL_PHONE),
                   42)
       }
   } else {
       // Permission has already been granted
       callPhone()
   }
}

override fun onRequestPermissionsResult(requestCode: Int,
        permissions: Array<String>, grantResults: IntArray) {
    if (requestCode == 42) {
            // If request is cancelled, the result arrays are empty.
            if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                // permission was granted, yay!
                callPhone()
            } else {
                // permission denied, boo! Disable the
                // functionality
            }
            return
        }
}

fun callPhone(){
        val intent = Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "1122334455"))
        startActivity(intent)
}

不要忘记你也需要它在清单上。而且您可以删除从您的活动中导出的内容，这是毫无意义的。

我希望它有所帮助！

如何在Kotlin中正确调用手机的意图？

1 个答案: