Android中判斷網絡是否鏈接代碼:java
mainActivity:
倒包狀況:android
import com.google.ads.AdRequest; import com.google.ads.AdSize; import com.google.ads.AdView; import android.net.ConnectivityManager; import android.net.NetworkInfo.State; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.util.Log; import android.widget.LinearLayout; import android.widget.Toast;
public class MainActivity extends Activity {網絡
//檢測網絡鏈接狀態
private ConnectivityManager manager;
private LinearLayout ll;
private AdView adsView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}app
/**
* 檢測網絡是否鏈接
* @return
*/
private boolean checkNetworkState() {
boolean flag = false;
//獲得網絡鏈接信息
manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
//去進行判斷網絡是否鏈接
if (manager.getActiveNetworkInfo() != null) {
flag = manager.getActiveNetworkInfo().isAvailable();
}
if (!flag) {
setNetwork();
} else {
// isNetworkAvailable();
}less
return flag;
}ide
/**
* 網絡未鏈接時,調用設置方法
*/
private void setNetwork(){
Toast.makeText(this, "wifi is closed!", Toast.LENGTH_SHORT).show();
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle("網絡提示信息");
builder.setMessage("網絡不可用,若是繼續,請先設置網絡!");
builder.setPositiveButton("設置", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = null;
/**
* 判斷手機系統的版本!若是API大於10 就是3.0+
* 由於3.0以上的版本的設置和3.0如下的設置不同,調用的方法不一樣
*/
if (android.os.Build.VERSION.SDK_INT > 10) {
intent = new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS);
} else {
intent = new Intent();
ComponentName component = new ComponentName(
"com.android.settings",
"com.android.settings.WirelessSettings");
intent.setComponent(component);
intent.setAction("android.intent.action.VIEW");
}
startActivity(intent);
}
});ui
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {this
}
});
builder.create();
builder.show();
}
/**
* 網絡已經鏈接,而後去判斷是wifi鏈接仍是GPRS鏈接
* 設置一些本身的邏輯調用
*/
private void isNetworkAvailable(){
State gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
if(gprs == State.CONNECTED || gprs == State.CONNECTING){
Toast.makeText(this, "wifi is open! gprs", Toast.LENGTH_SHORT).show();
}
//判斷爲wifi狀態下才加載廣告,若是是GPRS手機網絡則不加載!
if(wifi == State.CONNECTED || wifi == State.CONNECTING){
Toast.makeText(this, "wifi is open! wifi", Toast.LENGTH_SHORT).show();
loadAdmob();
}
}
/**
* 在wifi狀態下 加載admob廣告
*/
private void loadAdmob(){
ll = (LinearLayout) findViewById(R.id.load_ads);
ll.removeAllViews();
adsView = new AdView(this, AdSize.BANNER, "a15194a1ac9505d");
ll.addView(adsView);
adsView.loadAd(new AdRequest());
}
@Override
protected void onResume() {
Log.i("lzan13", "onResume");
checkNetworkState();
super.onResume();
}
@Override
protected void onDestroy() {
Log.i("lzan13", "onDestroy");
super.onDestroy();
}google
}spa
在AndroidManifest.xml的權限設置:
<!-- 訪問網絡權限 --> <uses-permission android:name="android.permission.INTERNET" /> <!-- 檢測網絡狀態權限 --> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />