Android 创建一个显示wifi可用连接的应用程序
我正在尝试创建一个显示Wifi连接的应用程序Android 创建一个显示wifi可用连接的应用程序,android,Android,我正在尝试创建一个显示Wifi连接的应用程序 package com.example.amit.ak503; import java.util.List; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.ScanRe
package com.example.amit.ak503;
import java.util.List;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Switch;
import android.widget.Toast;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
static int LENGTH_SHORT=600;
Switch s1;
WifiManager obj1;
WifiReceiver obj2;//obj of parent broadcastReceiver class
StringBuilder sb=new StringBuilder();
private final Handler handler=new Handler();
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
obj1=(WifiManager)getSystemService(Context.WIFI_SERVICE);
s1=(Switch)findViewById(R.id.switch1);
s1.setChecked(true);
obj2=new WifiReceiver();
registerReceiver(obj2,new
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
s1.setOnClickListener(new
View.OnClickListener() {
@Override
public void onClick(View v) {
if(s1.isChecked())
{
obj1.setWifiEnabled(true);
Toast.makeText(MainActivity.this,"Wifi enabled",Toast.LENGTH_SHORT).show();
}
else
{
obj1.setWifiEnabled(false);
Toast.makeText(MainActivity.this,"Wifi Disabled",Toast.LENGTH_SHORT).show();
}
doInback();
}
});
}
public void doInback()
{
handler.postDelayed(new Runnable() {
@Override
public void run() {
obj1=(WifiManager)getSystemService(Context.WIFI_SERVICE);
obj2=new WifiReceiver();
registerReceiver(obj2,new
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
obj1.startScan();
doInback();
}
},1000);
}
public boolean onCreateOptionsMenu(Menu menu)
{
menu.add(0,0,0,"Refresh");
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item)
{//replaced onMenuItemSelected(featuredid,MenuItem item) with
onOptionsItemSelected(MenuItem item)
obj1.startScan();
Toast.makeText(MainActivity.this,"Refreshing",Toast.LENGTH_SHORT).show();
return super.onOptionsItemSelected(item);
}
@Override
protected void onPause()
{
unregisterReceiver(obj2);
super.onPause();
Toast.makeText(MainActivity.this,"Unregistering
Receiver",Toast.LENGTH_SHORT).show();
}
@Override
protected void onResume()
{
registerReceiver(obj2,new
IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
Toast.makeText(MainActivity.this,"Registering
Receiver",Toast.LENGTH_SHORT).show();
}
class WifiReceiver extends BroadcastReceiver
{
public void onReceive(Context c,Intent intent)
{
//Toast.makeText(MainActivity.this,"onReceive
Started",Toast.LENGTH_SHORT).show();
ArrayList<String> connections=new ArrayList<String>();
ArrayList<Float> Signal_strength=new ArrayList<Float>();
sb=new StringBuilder();
List<ScanResult> wifiList;
wifiList=obj1.getScanResults();
for(int i=0;i<wifiList.size();i++)
{
connections.add(wifiList.get(i).SSID);
}
}
}
package com.example.amit.ak503;
导入java.util.List;
导入android.content.BroadcastReceiver;
导入android.content.Context;
导入android.content.Intent;
导入android.content.IntentFilter;
导入android.net.wifi.ScanResult;
导入android.net.wifi.WifiManager;
导入android.os.Handler;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.Switch;
导入android.widget.Toast;
导入java.lang.reflect.Array;
导入java.util.ArrayList;
导入java.util.List;
公共类MainActivity扩展了AppCompatActivity{
静态整数长度_SHORT=600;
开关s1;
WIFIJ1;
WifiReceiver obj2;//父broadcastReceiver类的obj
StringBuilder sb=新的StringBuilder();
私有最终处理程序=新处理程序();
@凌驾
创建时的公共void(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
obj1=(WifiManager)getSystemService(Context.WIFI_服务);
s1=(开关)findViewById(R.id.switch1);
s1.设置检查(真);
obj2=新的WifiReceiver();
寄存器接收器(obj2,新
IntentFilter(WifiManager.SCAN\u RESULTS\u AVAILABLE\u ACTION));
s1.setOnClickListener(新的
View.OnClickListener(){
@凌驾
公共void onClick(视图v){
如果(s1.isChecked())
{
obj1.setWifiEnabled(真);
Toast.makeText(MainActivity.this,“启用Wifi”,Toast.LENGTH_SHORT.show();
}
其他的
{
obj1.setWifiEnabled(假);
Toast.makeText(MainActivity.this,“Wifi已禁用”,Toast.LENGTH_SHORT.show();
}
doInback();
}
});
}
公共void doInback()
{
handler.postDelayed(新的Runnable(){
@凌驾
公开募捐{
obj1=(WifiManager)getSystemService(Context.WIFI_服务);
obj2=新的WifiReceiver();
寄存器接收器(obj2,新
IntentFilter(WifiManager.SCAN\u RESULTS\u AVAILABLE\u ACTION));
obj1.startScan();
doInback();
}
},1000);
}
公共布尔onCreateOptions菜单(菜单)
{
添加(0,0,0,“刷新”);
返回super.onCreateOptions菜单(菜单);
}
公共布尔值onOptionsItemSelected(菜单项项)
{//将onMenuItemSelected(featuredid,MenuItem项)替换为
onOptionsItemSelected(菜单项)
obj1.startScan();
Toast.makeText(MainActivity.this,“刷新”,Toast.LENGTH_SHORT.show();
返回super.onOptionsItemSelected(项目);
}
@凌驾
受保护的void onPause()
{
未注册接收器(obj2);
super.onPause();
Toast.makeText(MainActivity.this,“注销
接受者“,吐司.长度(短).show();
}
@凌驾
受保护的void onResume()
{
寄存器接收器(obj2,新
IntentFilter(WifiManager.SCAN\u RESULTS\u AVAILABLE\u ACTION));
super.onResume();
Toast.makeText(MainActivity.this,“注册
接受者“,吐司.长度(短).show();
}
类WifiReceiver扩展了BroadcastReceiver
{
接收时公共无效(上下文c,意图)
{
//Toast.makeText(MainActivity.this,“onReceive
开始“,Toast.LENGTH_SHORT).show();
ArrayList connections=新建ArrayList();
ArrayList信号强度=新的ArrayList();
sb=新的StringBuilder();
列表wifiList;
wifiList=obj1.getScanResults();
对于(int i=0;i只需通过应用程序检查网络连接即可。您是否获得了所需的权限?访问WIFI\u状态和更改WIFI\u状态是否已获得它不存在可用的无线连接
不存在可用的无线连接?显示?连接?加密?按钮是否正常工作代码中没有按钮。By按钮我的意思是开关。我如何检查它?公共类ConnectionDetector{private Context\u Context;公共ConnectionDetector(Context Context){this.\u Context=Context;}公共布尔值是连接到Internet(){ConnectivityManager connectivity=(ConnectivityManager)\u Context.getSystemService(Context.connectivity\u SERVICE);如果(连接性!=null){NetworkInfo[]info=connectivity.getAllNetworkInfo();if(info!=null)for(int i=0;i<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.amit.ak503.MainActivity">
<Switch
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New Switch"
android:id="@+id/switch1"
android:layout_alignParentStart="true" />
</RelativeLayout>
}