使用Junit对Android应用进行单元测试-技术开发专区

使用Junit对Android应用进行单元测试

作者：廖煜嵘编译编辑：景保玉 2010-10-28 00:05 IT168网站原创

步骤3 SimpleCale Activity

　　本程序中只有一个Actity:MainActity.java,代码如下：

package com.mamlambo.article.simplecalc;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       final String LOG_TAG = "MainScreen";
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);

       final EditText value1 = (EditText) findViewById(R.id.value1);
       final EditText value2 = (EditText) findViewById(R.id.value2);

       final TextView result = (TextView) findViewById(R.id.result);

       Button addButton = (Button) findViewById(R.id.addValues);
       addButton.setOnClickListener(new OnClickListener() {

           public void onClick(View v) {
               try {
                   int val1 = Integer.parseInt(value1.getText().toString());
                   int val2 = Integer.parseInt(value2.getText().toString());

                   Integer answer = val1 + val2;
                   result.setText(answer.toString());
               } catch (Exception e) {
                   Log.e(LOG_TAG, "Failed to add numbers", e);
               }
           }
       });

       Button multiplyButton = (Button) findViewById(R.id.multiplyValues);
       multiplyButton.setOnClickListener(new OnClickListener() {

           public void onClick(View v) {
               try {
                   int val1 = Integer.parseInt(value1.getText().toString());
                   int val2 = Integer.parseInt(value2.getText().toString());

                   Integer answer = val1 * val2;
                   result.setText(answer.toString());
               } catch (Exception e) {
                   Log.e(LOG_TAG, "Failed to multiply numbers", e);
               }
           }
       });
   }
}

　　上面的代码十分简单，分别在两个按钮的onclick事件中，对用户输入的数进行了相加和相乘，看上去代码似乎没问题，但接下来，我们将通过Junit去发现其中的bug。