android(26)(使用开源框架xutils实现多线程断点下载)

使用之间先导入jar包!!!
1.布局文件:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et_path"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="http://192.168.1.100:8080" />

    <Button
        android:onClick="download"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下载" />

    <TextView
        android:id="@+id/tv_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

</LinearLayout>
2.业务逻辑的实现代码:
public class MainActivity extends Activity {
    private EditText et_path;
    private TextView tv_info;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_path = (EditText) findViewById(R.id.et_path);
        tv_info = (TextView) findViewById(R.id.tv_info);
    }

    public void download(View view){
        String path = et_path.getText().toString().trim();
        if(TextUtils.isEmpty(path)){
            Toast.makeText(this, "请输入下载的路径", 0).show();
            return;
        }else{
            HttpUtils http = new HttpUtils();
            HttpHandler handler = http.download(path,
                    "/sdcard/xxx.zip",
                    true, // 如果目标文件存在,接着未完成的部分继续下载。服务器不支持RANGE时将从新下载。
                    true, // 如果从请求返回信息中获取到文件名,下载完成后自动重命名。
                    new RequestCallBack<File>() {
                        //开始下载
                        @Override
                        public void onStart() {
                            tv_info.setText("conn...");
                        }
                        //正在下载
                        @Override
                        public void onLoading(long total, long current, boolean isUploading) {
                            tv_info.setText(current + "/" + total);
                        }
                        //下载成功
                        @Override
                        public void onSuccess(ResponseInfo<File> responseInfo) {
                            tv_info.setText("downloaded:" + responseInfo.result.getPath());
                        }
                        //下载失败
                        @Override
                        public void onFailure(HttpException error, String msg) {
                            tv_info.setText(msg);
                        }
                });
        }
    }

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