android_lesson_2

android单元测试

1.首先在AndroidManifest.xml中加入下面红色代码

　　<uses-library android:name="android.test.runner" /> <!-- append to application noe-->

　　<!-- append to manifest;  com.example.myfirstapp == manifest.package -->
　　<instrumentation android:name="android.test.InstrumentationTestRunner"  android:targetPackage="com.example.myfirstapp" />

2.l编写单元测试代码（选择要测试的方法，右键点击“Run As”--“Android Junit Test” ）

　　public class InputActivityTest extends AndroidTestCase{
    　　 public void test() throws Exception {
      　　  InputService inputService=new InputService();
      　　  Integer r=inputService.queryPort();
      　　  Assert.assertEquals(new Integer(1), r);
    　　}
　　}

note:
          无法导出文件:"Failed to pull selection",查看文件名是否存在中文、权限是否为rw

<!--申请操作sd卡读和删权限 -->

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

<!-- 申请操作sd卡写的权限 -->

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

文件操作:

 

package com.example.myfirstapp;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import android.content.Context;
import android.os.Environment;

public class FileOperatorService {
    private Context context;

    public void SetContext(Context context) {
        this.context = context;
    }

    public void write(String fileName, String content) throws Exception {
        FileOutputStream out = context.openFileOutput(fileName,context.MODE_PRIVATE);
        out.write(content.getBytes());
        out.close();
    }

    public String read(String fileName) throws Exception {
        FileInputStream reader = context.openFileInput(fileName);
        ByteArrayOutputStream memoryArr = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];
        int len;
        while ((len = reader.read(buf)) != -1) {
            memoryArr.write(buf, 0, len);
        }
        byte[] data = memoryArr.toByteArray();
        memoryArr.close();
        reader.close();
        return new String(data);
    }
    
    public void write2sdCard(String fileName, String content) throws Exception {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            File sdCardDir=Environment.getExternalStorageDirectory();
            File file=new File(sdCardDir,fileName);
            FileOutputStream out=new FileOutputStream(file);
            out.write(content.getBytes());
            out.close();
        }
    }

    public String readFromSDCard(String fileName) throws Exception {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            File sdCardDir=Environment.getExternalStorageDirectory();
            File file=new File(sdCardDir,fileName);
            FileInputStream reader = new FileInputStream(file);
            ByteArrayOutputStream memoryArr = new ByteArrayOutputStream();
            byte[] buf = new byte[1024];
            int len;
            while ((len = reader.read(buf)) != -1) {
                memoryArr.write(buf, 0, len);
            }
            byte[] data = memoryArr.toByteArray();
            memoryArr.close();
            reader.close();
            return new String(data);
        }
        return null;
    }

}