wifi信号强度

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获取wifi信号强度

import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    private WifiManager wifiManager;    private int level;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);        WifiInfo wifiInfo = wifiManager.getConnectionInfo();        //获得信号强度值        level = wifiInfo.getRssi();        //根据获得的信号强度发送信息        if (level <= 0 && level >= -50) {            Toast.makeText(MainActivity.this,                    "信号强度：" + level + " 信号最好", Toast.LENGTH_SHORT)                    .show();        } else if (level < -50 && level >= -70) {            Toast.makeText(MainActivity.this,                    "信号强度：" + level + " 信号较好", Toast.LENGTH_SHORT)                    .show();        } else if (level < -70 && level >= -80) {            Toast.makeText(MainActivity.this,                    "信号强度：" + level + " 信号一般", Toast.LENGTH_SHORT)                    .show();        } else if (level < -80 && level >= -100) {            Toast.makeText(MainActivity.this,                    "信号强度：" + level + " 信号较差", Toast.LENGTH_SHORT)                    .show();        } else {            Toast.makeText(MainActivity.this,                    "信号强度：" + level + " 无信号", Toast.LENGTH_SHORT)                    .show();        }    }}

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

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