如何使用Android顺序布局?
在学习Android顺序布局之前,我们应该了解Android中的顺序布局是什么。顺序布局包含一系列步骤和进度条。根据顺序,它会显示一个动画进度条。
本例演示了如何使用Android顺序布局。
步骤1 − 在Android Studio中创建一个新项目,转到文件 ⇒ 新建项目,并填写所有必需的详细信息以创建新项目。
步骤2 − 打开build.gradle(app)并添加设计支持库依赖项。
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.andy.myapplication"
minSdkVersion 19
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
implementation 'com.github.transferwise:sequence-layout:1.0.7'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}步骤3 − 打开build.gradle(project)并添加设计支持库依赖项。
// 顶层构建文件,您可以在其中添加所有子项目/模块共有的配置选项。
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
maven { url "https://jitpack.io" }
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}步骤4 − 将以下代码添加到res/layout/activity_main.xml。
<?xml version="1.0" encoding="utf-8"?> <com.transferwise.sequencelayout.SequenceLayout android:layout_width="match_parent" android:layout_height="wrap_content" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <com.transferwise.sequencelayout.SequenceStep android:id="@+id/first" android:layout_width="match_parent" android:layout_height="wrap_content" app:subtitle="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s." app:anchor="30 Nov" app:title="First step"/> <com.transferwise.sequencelayout.SequenceStep android:id="@+id/second" android:layout_width="match_parent" android:layout_height="wrap_content" app:subtitle="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s." app:title="Second step"/> <com.transferwise.sequencelayout.SequenceStep android:id="@+id/third" android:layout_width="match_parent" android:layout_height="wrap_content" app:anchor="Today" app:title="Third step" app:subtitle="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s" /> </com.transferwise.sequencelayout.SequenceLayout>
在上面,我们将顺序布局声明为父布局,并将顺序步骤添加为各个步骤。每个步骤都包含锚点视图、标题和副标题。
步骤5 − 将以下代码添加到src/MainActivity.java
package com.example.andy.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;
import com.transferwise.sequencelayout.SequenceStep;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
SequenceStep sequenceStep,sequenceStep2,sequenceStep3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sequenceStep=findViewById(R.id.first);
sequenceStep2=findViewById(R.id.second);
sequenceStep3=findViewById(R.id.third);
sequenceStep2.setActive(true);
sequenceStep.setOnClickListener(this);
sequenceStep2.setOnClickListener(this);
sequenceStep3.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.first:
Toast.makeText(MainActivity.this,"This is first step",Toast.LENGTH_LONG).show();
break;
case R.id.second:
Toast.makeText(MainActivity.this,"This is second step",Toast.LENGTH_LONG).show();
break;
case R.id.third:
Toast.makeText(MainActivity.this,"This is Third step",Toast.LENGTH_LONG).show();
break;
}
}
}在上面的代码中,我们声明了顺序步骤并给出了点击监听器。要激活步骤,请使用以下代码。
sequenceStep2.setActive(true);
在上面的代码中,我们声明了sequence2处于活动状态,这意味着进度条将显示到步骤2。
让我们尝试运行您的应用程序。我假设您已将您的实际Android移动设备连接到您的计算机。要在Android Studio中运行应用程序,请打开项目的活动文件之一,然后单击运行
工具栏中的图标。选择您的移动设备作为选项,然后检查您的移动设备,它将显示您的默认屏幕 −

在上面的示例中,由于我们声明了活动模式,因此它显示了进度条。
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