参考Android平台提供的API接口并实现一个具有定位、相机、网络权限请求功能的Android应用程序

以下是一个具有定位、相机、网络权限请求功能的Android应用程序的示例代码：

MainActivity.java

package com.example.permissionsdemo;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MainActivity extends AppCompatActivity implements LocationListener {

    private static final int REQUEST_LOCATION_PERMISSION = 1;
    private static final int REQUEST_CAMERA_PERMISSION = 2;
    private static final int REQUEST_INTERNET_PERMISSION = 3;

    private LocationManager mLocationManager;
    private TextView mLocationTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button locationButton = findViewById(R.id.location_button);
        Button cameraButton = findViewById(R.id.camera_button);
        Button internetButton = findViewById(R.id.internet_button);
        mLocationTextView = findViewById(R.id.location_text_view);

        mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        locationButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)
                        == PackageManager.PERMISSION_GRANTED) {
                    getLocation();
                } else {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                            REQUEST_LOCATION_PERMISSION);
                }
            }
        });

        cameraButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
                        == PackageManager.PERMISSION_GRANTED) {
                    openCamera();
                } else {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA},
                            REQUEST_CAMERA_PERMISSION);
                }
            }
        });

        internetButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.INTERNET)
                        == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(MainActivity.this, "Internet permission already granted", Toast.LENGTH_SHORT).show();
                } else {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.INTERNET},
                            REQUEST_INTERNET_PERMISSION);
                }
            }
        });
    }

    private void getLocation() {
        mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10, this);
    }

    private void openCamera() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivity(intent);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (requestCode == REQUEST_LOCATION_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                getLocation();
            } else {
                Toast.makeText(this, "Location permission denied", Toast.LENGTH_SHORT).show();
            }
        } else if (requestCode == REQUEST_CAMERA_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                openCamera();
            } else {
                Toast.makeText(this, "Camera permission denied", Toast.LENGTH_SHORT).show();
            }
        } else if (requestCode == REQUEST_INTERNET_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Internet permission granted", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Internet permission denied", Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    public void onLocationChanged(@NonNull Location location) {
        mLocationTextView.setText("Latitude: " + location.getLatitude() + "\nLongitude: " + location.getLongitude());
    }

    @Override
    public void onProviderDisabled(@NonNull String provider) {

    }

    @Override
    public void onProviderEnabled(@NonNull String provider) {

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/location_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Get Location" />

    <TextView
        android:id="@+id/location_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Location: " />

    <Button
        android:id="@+id/camera_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Open Camera" />

    <Button
        android:id="@+id/internet_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Check Internet Permission" />

</LinearLayout>

在这个示例中，我们首先在Activity中声明了所需的三个权限：ACCESS_FINE_LOCATION、CAMERA和INTERNET。

然后，在我们的Activity的onCreate方法中，我们设置了三个button的点击监听器，以便在用户单击按钮时请求所需的权限。

我们还实现了LocationListener接口，以便在位置变化时更新UI中的位置信息。

最后，在onRequestPermissionsResult方法中，我们处理用户的权限请求响应，并根据用户的响应执行相应的操作。

请注意，这只是一个示例代码，您需要根据您的具体应用程序需要进行调整。同时，您还需要在Manifest文件中声明这些权限，以确保您的应用程序在运行时具有所需的权限。