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" />

<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


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

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