1、activity_main中的xml中的布局

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2、MainActivity中的主代码

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package com.edu.niit.ceshi;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

public void sayHello(View v) {

TextView textView = (TextView) findViewById(R.id.textView);

EditText editText = (EditText) findViewById(R.id.editText);

textView.setText("Hello," + editText.getText().toString() + "!");

}

}

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3、单元测试布局程序

private static final String STRING_TO_BE_TYPED = "Peter";

@Rule

public ActivityTestRule

@Test

public void sayHello() {

onView(withId(R.id.editText))

.perform(typeText(STRING_TO_BE_TYPED),

closeSoftKeyboard());

onView(withText("Say hello!")).perform(click());

String expectedText = "Hello," + STRING_TO_BE_TYPED + "!";

onView(withId(R.id.textView))

.check(matches(withText(expectedText)));

}

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单元测试结果如上、、、、、