好吧，在SplashScreen屏幕之后。我的应用程序将检查Internet连接。如果有可用的互联网，它将调用WebView。否则，它将调用一个错误活动。
但是如何在SplashScreen中配对以检查互联网？
ACTIVITY SPLASH SCREEN：
public class Splash extends Activity{
private static int tempo_splash = 1000;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // Para o layout preencher toda tela do cel (remover a barra de tit.)
new Timer().schedule(new TimerTask() {
public void run() {
finish();
Intent intent = new Intent();
intent.setClass(Splash.this, MainActivity.class); //Chamando a classe splash e a principal (main)
startActivity(intent);
}
}, 2000);
}
}
MY CLASS CheckINTERNET：
public class CheckInternet extends Activity{
boolean status = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.internet);
Button btnStatus = (Button) findViewById(R.id.check_btn);
btnStatus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
status = checkInternetConnection();
if (status) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
final Intent mainIntent = new Intent(CheckInternet.this, MainActivity.class);
CheckInternet.this.startActivity(mainIntent);
CheckInternet.this.finish();
}
}, 5000);
}
else {
Toast.makeText(getApplicationContext(), "You don't have Internet connection. Try Again", Toast.LENGTH_LONG).show();
}
}
});
}
public boolean checkInternetConnection() {
ConnectivityManager connectivity = (ConnectivityManager)getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] inf = connectivity.getAllNetworkInfo();
if (inf != null) {
for (int i = 0; i < inf.length; i++) {
return true;
}
}
}
return false;
}
}
答案 0 :(得分：3)
试试这段代码......也许可以帮到你
public class SplashScreen extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.splash_screen);
if(isWorkingInternetPersent()){
splash();
}
else{
showAlertDialog(SplashScreen.this, "Internet Connection",
"You don't have internet connection", false);
}
}
public void splash() {
Thread timerTread = new Thread() {
public void run() {
try {
sleep(4000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
Intent intent = new Intent(getApplicationContext(), New_Main_Activity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
}
}
};
timerTread.start();
}
public boolean isWorkingInternetPersent() {
ConnectivityManager connectivityManager = (ConnectivityManager) getBaseContext()
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null) {
NetworkInfo[] info = connectivityManager.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
return false;
}
public void showAlertDialog(Context context, String title, String message, Boolean status) {
AlertDialog alertDialog = new AlertDialog.Builder(context).create();
// Setting Dialog Title
alertDialog.setTitle(title);
// Setting Dialog Message
alertDialog.setMessage(message);
// Setting alert dialog icon
// alertDialog.setIcon((status) ? R.mipmap.ic_launcher : R.mipmap.ic_launcher);
// Setting OK Button
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
System.exit(0);
}
});
// Showing Alert Message
alertDialog.show();
}
答案 1 :(得分：0)
你不应该只是为了检查连接而有一个Intent。我的建议是创建一个“实用程序”类 - 调用MyConnectivityChecker并在那里使用以下代码添加静态方法（isConnected）：
public class MyConnectivityChecker {
public static boolean isConnected(Context context){
boolean connected = false;
ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifi = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobile = connectivityManager .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
connected = (wifi.isAvailable() && wifi.isConnectedOrConnecting() || (mobile.isAvailable() && mobile.isConnectedOrConnecting()));
return connected;
}
}
然后在Splash活动中，无论您想要检查连接性，都可以像这样调用isConnected方法：
MyConnectivityChecker.isConnected(this)
例如，您可以这样做：
if(MyConnectivityChecker.isConnected(this)){
//connectivity available
}
else{
//no connectivity
}
我希望这会有所帮助。试一试，让我知道。
答案 2 :(得分：0)
您可以做的是检查SplashScreen计时器内的互联网连接。
new Timer().schedule(new TimerTask() {
public void run() {
if(isOnline()){
Intent intent = new Intent(Splash.this,WebViewActivity.class);
startActivity(intent);
finish();
}else{
Intent intent = new Intent(Splash.this,ErrorActivity.class);
startActivity(intent);
finish();
}
}
}, 2000);
对于互联网检查，您可以使用此方法。
public boolean isOnline() {
System.out.println("executeCommand");
Runtime localRuntime = Runtime.getRuntime();
try {
int i = localRuntime.exec("/system/bin/ping -c 1 8.8.8.8")
.waitFor();
System.out.println(" mExitValue " + i);
boolean bool = false;
if (i == 0) {
bool = true;
}
return bool;
} catch (InterruptedException localInterruptedException) {
localInterruptedException.printStackTrace();
System.out.println(" Exception:" + localInterruptedException);
return false;
} catch (IOException localIOException) {
localIOException.printStackTrace();
System.out.println(" Exception:" + localIOException);
}
return false;
}
注意：在onCreate()方法之外的SplashScreen中添加此方法。
快乐编码..
答案 3 :(得分：0)
创建以下实用程序类：
public class Utility {
/**
* This function check <u>Mobile Data</u> or <u>WiFi</u> is switched on or not..<br />
* It will be return <b>true</b> when switched on and return <b>false</b> when switched off.<br />
* <br />
* Developed by <b><a href="http://about.me/SutharRohit">Suthar Rohit</a></b>
*
* @param context {@link Context} of activity
* @return true if <u>Mobile Data</u> or <u>WiFi</u> is switched on.
*/
public static boolean isOnline(Context context) {
try {
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo nInfo = cm.getActiveNetworkInfo();
return nInfo != null && nInfo.isConnected();
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
}
并在启动画面中使用如下：
if(Utility.isOnline()) {
// INTERNET AVAILABLE
} else {
// INTERNET NOT AVAILABLE
}
答案 4 :(得分：0)
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.Handler;
public class SplashACtivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
NetworkInfo activeNetwork = ((ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE))
.getActiveNetworkInfo();
if (activeNetwork != null && activeNetwork.isConnectedOrConnecting()) {
// Load Webview
startActivity(new Intent(SplashACtivity.this, WebViewActivity.class));
} else {
// Show No internet
startActivity(new Intent(SplashACtivity.this, NoInternetACtivity.class));
}
}
}, 5000);
}
}
答案 5 :(得分：0)
尝试使用此代码：
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
public class ApplicationUtility {
ConnectivityManager connectivityManager;
NetworkInfo info;
public boolean checkConnection(Context context) {
boolean flag = false;
try {
connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
info = connectivityManager.getActiveNetworkInfo();
if (info.getType() == ConnectivityManager.TYPE_WIFI) {
System.out.println(info.getTypeName());
flag = true;
}
if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
System.out.println(info.getTypeName());
flag = true;
}
} catch (Exception exception) {
System.out.println("Exception at network connection....."
+ exception);
}
return flag;
}}
对于启动屏幕活动：
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;
public class Splash extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
Timer t = new Timer();
boolean checkConnection=new ApplicationUtility().checkConnection(this);
if (checkConnection) {
t.schedule(new splash(), 3000);
} else {
Toast.makeText(Splash.this,
"connection not found...plz check connection", 3000).show();
}
}
class splash extends TimerTask {
@Override
public void run() {
Intent i = new Intent(Splash.this,LoginActivity.class);
finish();
startActivity(i);
}
}
}