Android核心技术-day05-02-文件上传

最新推荐文章于 2025-07-08 16:53:40 发布

原创最新推荐文章于 2025-07-08 16:53:40 发布 · 140 阅读

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本文介绍了一个基于Android平台的文件上传应用实例，通过使用AsyncHttpClient进行HTTP请求，实现了从设备选择文件并上传到指定服务器的功能。文章详细展示了如何创建文件、读取用户选择的文件路径，并在确保文件存在且非空的情况下，将文件上传至服务器。

package com.gaozewen.fileupload;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.gaozewen.fileupload.http.AsyncHttpClient;
import com.gaozewen.fileupload.http.AsyncHttpResponseHandler;
import com.gaozewen.fileupload.http.RequestParams;

import org.apache.http.Header;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;

public class MainActivity extends AppCompatActivity {

    private EditText mEt_path;

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

        // 创建一个文件
        try {
            File file = new File(getCacheDir(), "upload.txt");
            BufferedWriter writer = new BufferedWriter(new FileWriter(file));
            writer.write("upload");
            writer.newLine();
            writer.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void upload(View view) {
        String path =  mEt_path.getText().toString().trim();
        if(TextUtils.isEmpty(path)){
            Toast.makeText(this,"路径不能为空", Toast.LENGTH_SHORT).show();
            return;
        }
        File file = new File(path);
        if (file.exists() && file.length() > 0) {
            try {
                AsyncHttpClient client = new AsyncHttpClient();
                RequestParams params = new RequestParams();
                params.put("profile_picture",file);
                client.post("http://192.168.1.102:8080/upload", params, new AsyncHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                        Toast.makeText(MainActivity.this,"上传成功", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
                        Toast.makeText(MainActivity.this,"上传失败", Toast.LENGTH_SHORT).show();
                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
                Toast.makeText(MainActivity.this,"上传失败", Toast.LENGTH_SHORT).show();
            }
        } else {
            Toast.makeText(this,"文件不存在或者内容为空", Toast.LENGTH_SHORT).show();
        }
    }
}