android中检测网络连接状态简单总结

相应几乎没有不跟网络打交道的android应用，那么在实际中就需求检测手机是否有网络连接，甚至需要判断是何种方式连接，这样能给用户带来更好的体验和一些使用指导，下面给出一些常用的判断，如果要知道是否有网络、以及是采用wifi连接的还是3G连接的，调用下面对应方法模型就OK了，代码如下：

TestNetworkActivity：

package com.home.testnetwork;import java.util.List;import android.app.Activity;import android.content.Context;import android.location.LocationManager;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;public class TestNetworkActivity extends Activity implements OnClickListener {private Button checkBtn;private EditText netText;private EditText wifiText;private EditText net3gText;private EditText gpsText;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);checkBtn = (Button) findViewById(R.id.main_btn_check);checkBtn.setOnClickListener(this);wifiText = (EditText) findViewById(R.id.main_et_wifi);net3gText = (EditText) findViewById(R.id.main_et_3g);gpsText = (EditText) findViewById(R.id.main_et_GPS);netText = (EditText) findViewById(R.id.main_et_net);}/** * 检测网络是否连接 *  * @return */private boolean isNetConnected() {ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);if (cm != null) {NetworkInfo[] infos = cm.getAllNetworkInfo();if (infos != null) {for (NetworkInfo ni : infos) {if (ni.isConnected()) {return true;}}}}return false;}/** * 检测wifi是否连接 *  * @return */private boolean isWifiConnected() {ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);if (cm != null) {NetworkInfo networkInfo = cm.getActiveNetworkInfo();if (networkInfo != null&& networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {return true;}}return false;}/** * 检测3G是否连接 *  * @return */private boolean is3gConnected() {ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);if (cm != null) {NetworkInfo networkInfo = cm.getActiveNetworkInfo();if (networkInfo != null&& networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {return true;}}return false;}/** * 检测GPS是否打开 *  * @return */private boolean isGpsEnabled() {LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);List<String> accessibleProviders = lm.getProviders(true);for (String name : accessibleProviders) {if ("gps".equals(name)) {return true;}}return false;}@Overridepublic void onClick(View v) {if (v == checkBtn) {netText.setText(isNetConnected() + "");wifiText.setText(isWifiConnected() + "");net3gText.setText(is3gConnected() + "");gpsText.setText(isGpsEnabled() + "");}}}

布局xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <Button        android:id="@+id/main_btn_check"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="检测网络" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="网络是否连接:" />        <EditText            android:id="@+id/main_et_net"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="10dp"            android:enabled="false" />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="wifi是否连接:" />        <EditText            android:id="@+id/main_et_wifi"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="10dp"            android:enabled="false" />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="3G是否连接:" />        <EditText            android:id="@+id/main_et_3g"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="10dp"            android:enabled="false" />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="GPS是否打开:" />        <EditText            android:id="@+id/main_et_GPS"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="10dp"            android:enabled="false" />    </LinearLayout></LinearLayout>

记得加上相应权限~

附上图片结果：