非wifi用户选在图片加载模式

来源：互联网发布：1大学生网络党校编辑：程序博客网时间：2024/06/05 03:31
public class MainActivity extends AppCompatActivity {    ConnectivityBroadcastReceiver mConnectivityBroadcastReceiver;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //注册        IntentFilter filter = new IntentFilter();        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);        mConnectivityBroadcastReceiver = new ConnectivityBroadcastReceiver();        registerReceiver(mConnectivityBroadcastReceiver, filter);    }    //测试一下    public void onTestBaseUrl(View view){        Toast.makeText(MainActivity.this,NetUtils.getInstance().getBASE_URL(),Toast.LENGTH_SHORT).show();    }    public void onClick(View view){        String[] strings={"最佳效果", "较省流量", "极省流量"};        int mode= Myapp.getMyapp().getSharedPreferences(NetUtils.SP_NAME,Context.MODE_PRIVATE).getInt(NetUtils.PICTURE_LOAD_MODE_KEY,0);        AlertDialog.Builder builder=new AlertDialog.Builder(this);        builder.setTitle("非wife网络流量");        builder.setSingleChoiceItems(strings, mode, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                //// TODO: 2017/8/10  要保存我们的图片加载模式                Myapp.getMyapp().getSharedPreferences(NetUtils.SP_NAME,Context.MODE_PRIVATE).edit().putInt(NetUtils.PICTURE_LOAD_MODE_KEY,which).commit();                dialog.dismiss();            }        });        builder.setNegativeButton("取消",null);        builder.create().show();    }     * 接受网络状态的改变    public class ConnectivityBroadcastReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {                boolean isMobileConnectivity = true;                //如果能走到这，说明网络已经发生变化                ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);                NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();                if (activeNetworkInfo != null && activeNetworkInfo.isConnected()) {                    if (ConnectivityManager.TYPE_WIFI == activeNetworkInfo.getType()) {                        Toast.makeText(MainActivity.this, "wifi可用，下载吧", Toast.LENGTH_SHORT).show();                        isMobileConnectivity = false;                    } else if (ConnectivityManager.TYPE_MOBILE == activeNetworkInfo.getType()) {                        Toast.makeText(MainActivity.this, "现在是移动网络，当心", Toast.LENGTH_SHORT).show();                        isMobileConnectivity = true;                        //获得现在的网络状态 是移动网络，去改变我们的访问接口                    } else {                        Toast.makeText(MainActivity.this, "网络不可用，请检查网络", Toast.LENGTH_SHORT).show();                    }                } else {                    Toast.makeText(MainActivity.this, "网络不可用，请检查网络", Toast.LENGTH_SHORT).show();                }                //// TODO: 2017/8/10 改变一下网络状态                NetUtils.getInstance().changeNetState(isMobileConnectivity);            }        }    }    @Override    protected void onDestroy() {        super.onDestroy();        //解注册        unregisterReceiver(mConnectivityBroadcastReceiver);    }}Application类：public class Myapp extends Application {    private static Myapp myapp;    @Override    public void onCreate() {        super.onCreate();        myapp=this;    }    public static Context getMyapp(){        return myapp;    }}NetUtils类：
public class NetUtils {    private static NetUtils netutils;    public static final String SP_NAME = "SP_NAME";    public static final String PICTURE_LOAD_MODE_KEY = "PICTURE_LOAD_MODE_KEY";    private static final String BASE_URL_BIG_PICTURE = "http://www.big.picture";    private static final String BASE_URL_SMALL_PICTURE = "http://www.small.picture";    private static final String BASE_URL_NO_PICTURE = "http://www.no.picture";    //baseurl默认使用大图的模式    private String BASE_URL = BASE_URL_BIG_PICTURE;    private boolean isMobileConnectivity = true;    public  NetUtils(){    }    //单例模式    public static NetUtils getInstance(){        if (netutils==null){            synchronized (NetUtils.class){              if (netutils==null){                  netutils=new NetUtils();              }            }        }        return netutils;    }     * 使用get post请求的时候，调用这个方法获取我们的baseUrl，直接去请求就可以    public String getBASE_URL(){        // TODO: 2017/8/10  根据网络状态和用户选择，选择对应的baseurl       if (isMobileConnectivity){           //// TODO: 2017/8/10  根据用户选择 返回对应的url           int mode= Myapp.getMyapp().getSharedPreferences(SP_NAME, Context.MODE_PRIVATE).getInt(PICTURE_LOAD_MODE_KEY,0);           switch (mode){               case 0:                   BASE_URL=BASE_URL_BIG_PICTURE;                   break;               case 1:                   BASE_URL=BASE_URL_SMALL_PICTURE;                   break;               case 2:                   BASE_URL=BASE_URL_NO_PICTURE;                   break;           }       }else {           BASE_URL=BASE_URL_BIG_PICTURE;       }       return BASE_URL;    }    //更改我们当前的网络状态    public void changeNetState(boolean isMobileConnectivity ){        this.isMobileConnectivity=isMobileConnectivity;    }}
<!--上网权限 和 获取网络状态的权限--><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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