小编Abh*_*hek的帖子

我正在实施 Android Room 数据库，在其中一个教程中我发现了androidx.legacy:legacy-support-v4:1.0.0依赖项的用法。任何人都可以告诉我如何使用这种依赖项。

是否可以在按下某个按钮后跟踪哪个活动被打开？
我有一个测试,当点击/按下按钮时,它会向服务器发送一个请求.直到发送请求的时间,它会打开一个活动.为了验证测试的成功执行,我需要检查什么是打开的Activity.

我的测试示例:

检查Espresso中打开的Intent ---

 private void startTest() {
    recreateAuthData(InstrumentationRegistry.getTargetContext(), "d78269d9-9e00-4b8d-9242-815204b0a2f6", "3f32da21-914d-4adc-b6a1-891b842a2972");

    InstrumentationRegistry.getTargetContext().getSharedPreferences(ActivitySplashScreen.class.getSimpleName(),
            Context.MODE_PRIVATE).edit().putInt(ActivitySplashScreen.PROPERTY_APP_VERSION, ActivitySplashScreen.getAppVersion(InstrumentationRegistry.getTargetContext())).commit();
    InstrumentationRegistry.getTargetContext().getSharedPreferences(ActivitySplashScreen.class.getSimpleName(),
            Context.MODE_PRIVATE).edit().putString(ActivitySplashScreen.PROPERTY_REG_ID, "testKey").commit();

    mActivityRule.launchActivity(setIntent());
    // inputPinCode("2794");
}

@Test
public void testIdent() {
    startTest();
    onView(withText("???")).perform(click());
    putDelay(500);
    onView(withId(R.id.get_pro)).perform(click());
    onView(withText("??????????? ?? ?????????? ??????")).perform(click());
    putDelay(500);
    closeSoftKeyboard();
    onView(withId(R.id.btn_goto_passport)).perform(click());
    onView(withHint("????? ? ????? ????????")).perform(replaceText("9894657891"));
    onView(withHint("???? ?????? ????????")).perform(replaceText("17032014"));
    onView(withHint("???? ????????")).perform(replaceText("31091994"));
    onView(withHint("?????")).perform(replaceText("54665285919"));
    putDelay(500);
    Log.d("TestWidget", hasComponent(hasShortClassName("ActivityMain")).toString());
    onView(withId(R.id.btn_next)).perform(click());
    // some code which check which activity is display now
    putDelay(500);

}

我有一个TextView会在点击按钮时显示不同的文字.但问题是,按钮位置因TextView尺寸而改变.我不希望在不使用边距的情况下更改按钮位置.请帮忙.

我的设计XML代码.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.arnab.androiddevelopmentfundamentals.MainActivity">

    <TextView
        android:id="@+id/MyTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="28dp"
        android:text="@string/ui_and_events"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/MyText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/MyTitle"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="39dp"
        android:text="@string/my_text"
        android:textColor="@color/colorPrimary"
        android:textSize="30sp" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/MyText"
        android:layout_below="@+id/MyText"
        android:layout_marginTop="33dp"
        android:text="@string/change_1" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="48dp"
        android:text="@string/change_2" />

    </RelativeLayout>

我点击按钮的java代码.

package com.example.arnab.androiddevelopmentfundamentals;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    TextView MyText;
    Button …