xutils操作 xutils操作

判断网络,wifi 4g,
new AlertDialog.Builder(MainActivity.this)
.setIcon(R.mipmap.ic_launcher)
.setTitle("网络选择")
.setSingleChoiceItems(new String[] {"wife","手机流量"},2,

new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) { switch (which){ case 0: Toast.makeText(MainActivity.this, "wife", Toast.LENGTH_SHORT).show(); dialog.dismiss(); new AlertDialog.Builder(MainActivity.this) .setTitle("版本更新") .setMessage("现在检测到新版本,是否更新？") .setPositiveButton("下载", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { downloadApk(); dialog.dismiss(); } }) .setNegativeButton("取消", null) .create() .show(); break; case 1: Toast.makeText(MainActivity.this, "跳到wife界面", Toast.LENGTH_SHORT).show(); //跳转网络设置界面隐士意图 Intent intent = new Intent(); intent.setAction("android.settings.WIRELESS_SETTINGS"); startActivity(intent); dialog.dismiss(); break; } } } ) .setNegativeButton("取消", null) .show();

Xutils请求数据
private void getData() {
String path = "http://v.juhe.cn/toutiao/index";
RequestParams params = new RequestParams(path);
params.addQueryStringParameter("key","5b6258c74f4346147b12fe38490a12b2");
params.addQueryStringParameter("type","top");
x.http().get(params, new Callback.CommonCallback() {

private MyBaseAdapter adapter; @Override public void onSuccess(String result) { System.out.println("-----------------"+result); Gson gson = new Gson(); Yuekao2Info yuekao2Info = gson.fromJson(result, Yuekao2Info.class); List data = https://www.it610.com/article/yuekao2Info.getResult().getData(); if (adapter == null) { adapter = new MyBaseAdapter(data,MainActivity.this); xListView.setAdapter(adapter); }else { adapter.loadMore(data,flag); adapter.notifyDataSetChanged(); } }@Override public void onError(Throwable ex, boolean isOnCallback) {}@Override public void onCancelled(CancelledException cex) {}@Override public void onFinished() {} }); }

progressBar的一系列操作
private void downloadApk() {
String url = "http://down11.zol.com.cn/suyan/lulutong3.6.5g.apk";
String path = Environment.getExternalStorageDirectory().getPath() + "/teme1/myapk.apk";
File file = new File(path);
File parentFile = file.getParentFile();
if (!parentFile.exists()) {
parentFile.mkdir();
}

RequestParams params = new RequestParams(url); params.setAutoRename(false); params.setAutoResume(true); //设置保存路径 params.setSaveFilePath(path); x.http().get(params, new Callback.ProgressCallback() { @Override public void onSuccess(File result) { Toast.makeText(MainActivity.this, "下载成功", Toast.LENGTH_SHORT).show(); installDownloadApk(result); }@Override public void onError(Throwable ex, boolean isOnCallback) { Toast.makeText(MainActivity.this, "下载失败", Toast.LENGTH_SHORT).show(); }@Override public void onCancelled(CancelledException cex) {}@Override public void onFinished() { cancleProgressDialog(); }@Override public void onWaiting() {}@Override public void onStarted() { showProgressDialog(); }@Override public void onLoading(long total, long current, boolean isDownloading) { int progress = (int) (current * 100/ total ); if (progress >= 0 && progress <= 100) { updataProgressDialog(progress); } } }); } //安卓开发 apk安装 private void installDownloadApk(File result) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setDataAndType(Uri.fromFile(result), "application/vnd.android.package-archive"); startActivity(intent); }private void cancleProgressDialog() { if (progressDialog == null) { return; } if (progressDialog.isShowing()) { progressDialog.dismiss(); } }private void updataProgressDialog(int progress) { if (progressDialog == null) { return; } progressDialog.setProgress(progress); }private void showProgressDialog() { progressDialog = new ProgressDialog(this); //设置progressDialog显示样式 progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMessage("我正在下载东西"); progressDialog.setTitle("请等待"); progressDialog.setProgress(0); progressDialog.show(); }

baseadapter适配器要灵活运用
public class MyBaseAdapter extends BaseAdapter {

private List data; private Context context; MyBaseAdapter(List data, Context context){ this.data = https://www.it610.com/article/data; this.context =context; } public void loadMore(List datas,boolean flag){for (Yuekao2Info.ResultBean.DataBean bean:datas) { if (flag){ data.add(0,bean); }else { data.add(bean); } }}@Override public int getCount() { return data.size(); }@Override public Object getItem(int position) { return data.get(position); }@Override public long getItemId(int position) { return position; }@Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null){ convertView = View.inflate(context,R.layout.item,null); holder = new ViewHolder(); holder.tv = (TextView) convertView.findViewById(R.id.tv); convertView.setTag(holder); }else { holder = (ViewHolder) convertView.getTag(); } ImageView iv = (ImageView) convertView.findViewById(R.id.iv); holder.tv.setText(data.get(position).getTitle()); loderImage(data.get(position).getThumbnail_pic_s(),iv); return convertView; } class ViewHolder{ TextView tv; ImageView iv; }publicvoid loderImage(String url,ImageView imageView){ ImageLoaderConfiguration configuration = ImageLoaderConfiguration .createDefault(context); DisplayImageOptions options = new DisplayImageOptions.Builder() .showImageOnLoading(R.mipmap.ic_launcher) .showImageOnFail(R.mipmap.ic_launcher) .cacheInMemory(true) .cacheOnDisk(true) .bitmapConfig(Bitmap.Config.RGB_565) .build(); ImageLoader instance = ImageLoader.getInstance(); instance.init(configuration); instance.displayImage(url, imageView ,options); //compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5' }

}
建一个application,在Androidmanifest清单文件中引用
application里面
x.Ext.init(this);
String path = Environment.getExternalStorageDirectory().getPath()+"/"+"Pictrues";
File file = new File(path);
【xutils操作】权限网络权限读写权限