网络是否可用判断以及Fragment

来源：互联网发布：轻而易举软件瓷砖教程编辑：程序博客网时间：2024/05/17 02:02
package com.bwie.yuekao01;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.provider.Settings;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.FrameLayout;import com.bwie.yuekao01.fragment.GnFragment;import com.bwie.yuekao01.fragment.JsFragment;import com.bwie.yuekao01.fragment.KjFragment;import com.bwie.yuekao01.fragment.TtFragment;public class MainActivity extends FragmentActivity implements View.OnClickListener {    private FrameLayout frame;    private Button btngn;    private Button btntt;    private Button btnjs;    private Button btnkj;    private TtFragment ttFragment;    private GnFragment gnFragment;    private JsFragment jsFragment;    private KjFragment kjFragment;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        boolean netWorkInfo = getNetWorkInfo(getApplicationContext());        if (!netWorkInfo) {            final Intent intent = new Intent();            intent.setAction("com.bwie.yuekao01");            intent.putExtra("info", "当前没有可用网络");            sendBroadcast(intent);            AlertDialog.Builder builder = new AlertDialog.Builder(this);            builder.setMessage("是否前去设置网络");            builder.setPositiveButton("设置", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    Intent intent1 = new Intent(Settings.ACTION_WIRELESS_SETTINGS);                    startActivity(intent1);                }            });            builder.setNegativeButton("不了",null);            builder.create().show();        }        frame = (FrameLayout) findViewById(R.id.frame);        btngn = (Button) findViewById(R.id.btngn);        btntt = (Button) findViewById(R.id.btntt);        btnjs = (Button) findViewById(R.id.btnjs);        btnkj = (Button) findViewById(R.id.btnkj);        btnkj.setOnClickListener(this);        btntt.setOnClickListener(this);        btngn.setOnClickListener(this);        btnjs.setOnClickListener(this);        ttFragment = new TtFragment();        gnFragment = new GnFragment();        jsFragment = new JsFragment();        kjFragment = new KjFragment();        FragmentManager manager = getSupportFragmentManager();        FragmentTransaction transaction = manager.beginTransaction();        transaction.add(R.id.frame, ttFragment);        transaction.add(R.id.frame, gnFragment);        transaction.add(R.id.frame, jsFragment);        transaction.add(R.id.frame, kjFragment);        transaction.hide(gnFragment);        transaction.hide(jsFragment);        transaction.hide(kjFragment);        transaction.commit();    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.btntt:                FragmentManager manager = getSupportFragmentManager();                FragmentTransaction transaction = manager.beginTransaction();                transaction.hide(gnFragment);                transaction.hide(jsFragment);                transaction.hide(kjFragment);                transaction.show(ttFragment);                transaction.commit();                break;            case R.id.btngn:                FragmentManager manager2 = getSupportFragmentManager();                FragmentTransaction transaction2 = manager2.beginTransaction();                transaction2.hide(ttFragment);                transaction2.hide(jsFragment);                transaction2.hide(kjFragment);                transaction2.show(gnFragment);                transaction2.commit();                break;            case R.id.btnkj:                FragmentManager manager3 = getSupportFragmentManager();                FragmentTransaction transaction3 = manager3.beginTransaction();                transaction3.hide(ttFragment);                transaction3.hide(jsFragment);                transaction3.hide(gnFragment);                transaction3.show(kjFragment);                transaction3.commit();                break;            case R.id.btnjs:                FragmentManager manager4 = getSupportFragmentManager();                FragmentTransaction transaction4 = manager4.beginTransaction();                transaction4.hide(ttFragment);                transaction4.hide(kjFragment);                transaction4.hide(gnFragment);                transaction4.show(jsFragment);                transaction4.commit();                break;        }    }    public boolean getNetWorkInfo(Context context) {        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo networkInfo = manager.getActiveNetworkInfo();        return networkInfo != null && networkInfo.isConnected();    }}
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