NoHttp封装--05 文件下载

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" ???android:layout_width="match_parent" ???android:layout_height="wrap_content" ???android:orientation="vertical" > ???<ProgressBar ???????android:id="@+id/pb_progress" ???????style="?android:attr/progressBarStyleHorizontal" ???????android:layout_width="match_parent" ???????android:layout_height="wrap_content" ???????android:layout_margin="10dp" /> ???<TextView ???????android:id="@+id/tv_result" ???????android:layout_width="match_parent" ???????android:layout_height="wrap_content" /> ???<Button ???????android:id="@+id/btn_start_download" ???????android:layout_width="match_parent" ???????android:layout_height="wrap_content" ???????android:layout_marginTop="10dp" ???????android:text="下载" /></LinearLayout>

 ?1 import com.yolanda.nohttp.Headers; ?2 import com.yolanda.nohttp.NoHttp; ?3 import com.yolanda.nohttp.download.DownloadListener; ?4 import com.yolanda.nohttp.download.DownloadRequest; ?5 import com.yolanda.nohttp.error.ArgumentError; ?6 import com.yolanda.nohttp.error.ClientError; ?7 import com.yolanda.nohttp.error.NetworkError; ?8 import com.yolanda.nohttp.error.ServerError; ?9 import com.yolanda.nohttp.error.StorageReadWriteError; 10 import com.yolanda.nohttp.error.StorageSpaceNotEnoughError; 11 import com.yolanda.nohttp.error.TimeoutError; 12 import com.yolanda.nohttp.error.URLError; 13 import com.yolanda.nohttp.error.UnKnownHostError; 14 import com.yolanda.nohttp5.R; 15 import com.yolanda.nohttp5.config.AppConfig; 16 import com.yolanda.nohttp5.nohttp.CallServer; 17 import com.yolanda.nohttp5.util.Toast; 18 ?19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.os.Environment; 22 import android.view.View; 23 import android.widget.ProgressBar; 24 import android.widget.TextView; 25 ?26 public class DownloadActivity extends Activity implements View.OnClickListener, DownloadListener { 27 ?28 ????private final static String PROGRESS_KEY = "download_progress"; 29 ????/** 30 ?????* 下载按钮、暂停、开始等. 31 ?????*/ 32 ????private TextView mBtnStart; 33 ????/** 34 ?????* 下载状态. 35 ?????*/ 36 ????private TextView mTvResult; 37 ????/** 38 ?????* 下载进度条. 39 ?????*/ 40 ????private ProgressBar mProgressBar; 41 ????/*** 42 ?????* 下载地址. 43 ?????*/ 44 ????private String url = "http://m.apk.67mo.com/apk/999129_21769077_1443483983292.apk"; 45 ????/** 46 ?????* 下载请求. 47 ?????*/ 48 ????private DownloadRequest downloadRequest; 49 ?50 ????@Override 51 ????protected void onCreate(Bundle savedInstanceState) { 52 ????????super.onCreate(savedInstanceState); 53 ????????setContentView(R.layout.activity_download); 54 ?55 ????????mProgressBar = (ProgressBar) findViewById(R.id.pb_progress); 56 ????????mBtnStart = (TextView) findViewById(R.id.btn_start_download); 57 ????????mTvResult = (TextView) findViewById(R.id.tv_result); 58 ????????mBtnStart.setOnClickListener(this); 59 ?60 ????????// url 下载地址 61 ????????// fileFolder 保存的文件夹 62 ????????// fileName 文件名 63 ????????// isRange 是否断点续传下载 64 ????????// isDeleteOld 如果发现文件已经存在是否删除后重新下载 65 ????????String path = Environment.getExternalStorageDirectory().getAbsolutePath(); 66 ????????downloadRequest = NoHttp.createDownloadRequest(url, path, "nohttp.apk", true, false); 67 ?68 ????????// 检查已经下载了一半的文件是什么状态 69 ????????int status = downloadRequest.checkBeforeStatus(); 70 ????????if (status == DownloadRequest.STATUS_FINISH) {// 文件已经下载完成 71 ????????????mTvResult.setText("下载完成"); 72 ????????????mBtnStart.setText("已经下载完成"); 73 ????????????// ... 提示用户安装apk 74 ????????} else if (status == DownloadRequest.STATUS_RESTART) {// 代表文件不存在，需要从头下载 75 ????????????mTvResult.setText(""); 76 ????????????mBtnStart.setText("下载"); 77 ????????} else if (status == DownloadRequest.STATUS_RESUME) {// 代表文件已经下载了一半了 78 ????????????int progress = AppConfig.getInstance().getInt(PROGRESS_KEY, 0); 79 ????????????mProgressBar.setProgress(progress); 80 ????????????mTvResult.setText("已经下载了 " + progress + "%"); 81 ????????????mBtnStart.setText("继续下载"); 82 ????????} 83 ????} 84 ?85 ????@Override 86 ????public void onClick(View v) { 87 ????????if (downloadRequest.isStarted()) { 88 ????????????// 暂停下载 89 ????????????downloadRequest.cancel(true); 90 ????????} else { 91 ????????????// what 区分下载 92 ????????????// downloadRequest 下载请求对象 93 ????????????// downloadListener 下载监听 94 ????????????CallServer.getDownloadInstance().add(0, downloadRequest, this); 95 ????????} 96 ????} 97 ?98 ????/** 99 ?????* @param what 代表哪一个下载100 ?????* @param isResume 是不是断点续续传开始下载的101 ?????* @param beforeLenght 断点开始的地方的文件大小102 ?????* @param headers 本地请求的时候的响应头103 ?????* @param allCount 本次需要下载多少104 ?????*/105 ????@Override106 ????public void onStart(int what, boolean isResume, long beforeLenght, Headers headers, long allCount) {107 ????????int progress = AppConfig.getInstance().getInt(PROGRESS_KEY, 0);108 ????????mTvResult.setText("已下载: " + progress + "%");109 ????????mBtnStart.setText("暂停");110 ????}111 112 ????@Override113 ????public void onProgress(int what, int progress, long fileCount) {114 ????????AppConfig.getInstance().putInt(PROGRESS_KEY, progress);115 ????????mProgressBar.setProgress(progress);116 ????????mTvResult.setText("已经下载了 " + progress + "%");117 ????}118 119 ????@Override120 ????public void onDownloadError(int what, Exception exception) {121 ????????mBtnStart.setText("再次尝试");122 123 ????????String message = "下载出错了：";124 ????????if (exception instanceof ClientError) {125 ????????????message += "客户端错误";126 ????????} else if (exception instanceof ServerError) {127 ????????????message += "服务器发生内部错误";128 ????????} else if (exception instanceof NetworkError) {129 ????????????message += "网络不可用，请检查网络";130 ????????} else if (exception instanceof StorageReadWriteError) {131 ????????????message += "存储卡错误，请检查存储卡";132 ????????} else if (exception instanceof StorageSpaceNotEnoughError) {133 ????????????message += "存储位置空间不足";134 ????????} else if (exception instanceof TimeoutError) {135 ????????????message += "下载超时";136 ????????} else if (exception instanceof UnKnownHostError) {137 ????????????message += "服务器找不到";138 ????????} else if (exception instanceof URLError) {139 ????????????message += "url地址错误";140 ????????} else if (exception instanceof ArgumentError) {141 ????????????message += "下载参数错误";142 ????????} else {143 ????????????message += "未知错误";144 ????????}145 ????????mTvResult.setText(message);146 ????}147 148 ????@Override149 ????public void onFinish(int what, String filePath) {150 ????????Toast.show("下载完成");151 ????????mTvResult.setText("下载完成，文件保存在：" + filePath);152 ????}153 154 ????@Override155 ????public void onCancel(int what) {156 ????????mTvResult.setText("下载暂停");157 ????????mBtnStart.setText("继续下载");158 ????}159 160 }