我在Google Play上有一个可以在我的手机上使用它作为远程测试设备的应用程序,但是当我将其上传到Play商店然后将其下载到我的手机上时它无法正常传输任何数据包。< / p>
请参阅下面的代码,我不知道问题是什么,我整天都在摸不着头脑,也许是权限问题?
package com.example.dale.whatismyip;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/**
* Created by Dale on 22/01/2017.
*/
public class PingActivity extends AppCompatActivity
{
private EditText pingEdit;
private String pingVal;
private TextView finalResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ping);
finalResult = (TextView) findViewById(R.id.result);
pingEdit = (EditText) findViewById(R.id.editText2);
final Button button = (Button) findViewById(R.id.button5);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
finalResult.setText("");
pingVal = pingEdit.getText().toString();
if(pingVal.contains(".") && pingVal.length() > 6)
{
PingTest runner = new PingTest();
runner.execute();
}
else
{
finalResult.setText("Invalid Address");
}
}
});
}
private class PingTest extends AsyncTask<String, String, String>
{
private String res;
@Override
protected String doInBackground(String... strings) {
try {
boolean sudo = false;
String cmd = "/system/bin/ping -c 4 -w 4 " + pingVal;
Process p;
if(!sudo)
p= Runtime.getRuntime().exec(cmd);
else{
p= Runtime.getRuntime().exec(new String[]{"su", "-c", cmd});
}
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s;
res = "";
while ((s = stdInput.readLine()) != null) {
// CODE TO DO - create an array and populate it
System.out.println(res += s + "\n");
}
p.destroy();
return res;
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
@Override
protected void onPostExecute(String result) {
// execution of result of Long time consuming operation
// CODE TO DO - pass this method both an array of type string and a string
// then do a while loop through it whilst the array is populated and set the value of the textview to the strings
finalResult.setText(result);
}
}
}
答案 0 :(得分:1)
问题排序。
代码本身很好,但android上的省电功能会停止ping功能,因为它会禁用后台网络使用。
答案 1 :(得分:0)
好的,这是一个建议,但你是通过电脑测试手机吗?是通过USB连接到电脑的手机吗?
你可以打印一个祝酒词,看看doInBackground
我在代码中找不到任何错误。