非wifi用户选择网络

来源：互联网发布：金山恢复数据在哪里编辑：程序博客网时间：2024/05/17 06:19
package com.example.pictureloaddemo;import android.content.BroadcastReceiver;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Toast;import com.example.pictureloaddemo.app.MyApplication;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 v) {        Toast.makeText(MainActivity.this, NetUtils.getInstance().getBASE_URL(), Toast.LENGTH_SHORT).show();    }    public void onClick(View v) {        // TODO: 2017/8/10 做一个alertDialog        String[] strings = {"最佳效果", "较省流量", "极省流量"};        int mode = MyApplication.getAppContext().getSharedPreferences(NetUtils.SP_NAME, Context.MODE_PRIVATE).getInt(NetUtils.PICTURE_LOAD_MODE_KEY, 0);        AlertDialog.Builder builder = new AlertDialog.Builder(this);        builder.setTitle("非wifi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                MyApplication.getAppContext().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);    }}Utils package com.example.pictureloaddemo;import android.content.Context;import com.example.pictureloaddemo.app.MyApplication;/** * Created by hasee on 2017/8/10. */public class NetUtils {    public static final String SP_NAME = "SP_NAME";    public static final String PICTURE_LOAD_MODE_KEY = "PICTURE_LOAD_MODE_KEY";    private boolean isMobileConnectivity = true;    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 static NetUtils mNetUtils;    private NetUtils() {    }    //单例模式    public static NetUtils getInstance() {        if (mNetUtils == null) {            synchronized (NetUtils.class) {                if (mNetUtils == null) {                    mNetUtils = new NetUtils();                }            }        }        return mNetUtils;    }    /**     * 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 = MyApplication.getAppContext().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;    }}APPpackage com.example.pictureloaddemo.app;import android.app.Application;import android.content.Context;/** * Created by hasee on 2017/8/10. */public class MyApplication extends Application {    private static MyApplication myApplication;    @Override    public void onCreate() {        super.onCreate();        myApplication = this;    }    public static Context getAppContext() {        return myApplication;    }}
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