如何在 Android 应用程序中创建可滚动文本视图?


该示例展示了如何在 Android 应用程序中创建可滚动的文本视图。

步骤 1 - 在 Android Studio 中创建一个新项目,转到文件 ⭢ 新建项目,然后填写所有必需信息以创建一个新项目。

步骤 2 - 向 res/layout/activity_main.xml 中添加以下代码。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/activity_main"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="5dp"
   tools:context=".MainActivity">
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:scrollbars="vertical" />
</RelativeLayout>

步骤 3 - 向 src/MainActivity.java 中添加以下代码

package app.com.sample;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      TextView textView = (TextView) findViewById(R.id.textView);
      String para = "Mohandas Karamchand Gandhi (/ˈɡɑːndi, ˈɡændi/;[2] Hindustani: [ˈmoːɦəndaːs ˈkərəmtʃənd ˈɡaːndʱi] (About this soundlisten);
         2 October 1869 – 30 January 1948) was an Indian activist who was the leader of the Indian independence movement against British colonial rule.[3]
         Employing nonviolent civil disobedience, Gandhi led India to independence and inspired movements for civil rights and freedom across the world.
         The honorific Mahātmā (Sanskrit: \"high-souled\", \"venerable\")[4] was applied to him first in 1914 in South Africa[5] and is now used worldwide.
         In India, he was also called Bapu, a term that he preferred[6] (Gujarati: endearment for father,[7] papa[7][8]), and Gandhi ji, and is known as the Father of the
         Nation.[9][10]
" + "
" + "Born and raised in a Hindu family in coastal Gujarat, western India, and trained in law at the Inner Temple, London, Gandhi first          employed nonviolent civil disobedience as an expatriate lawyer in South Africa, in the resident Indian community's struggle for civil rights. After his return          to India in 1915, he set about organising peasants,  farmers, and urban labourers to protest against excessive land-tax and discrimination.          Assuming leadership of the Indian National Congress in 1921, Gandhi led nationwide campaigns for various social causes and for achieving Swaraj or          self-rule.[11]
" + "
" + "Gandhi led Indians in challenging the British-imposed salt tax with the 400 km (250 mi) Dandi Salt March in 1930, and          later in calling for the British to Quit India in 1942. He was imprisoned for many years, upon many occasions, in both South Africa and India.          He lived modestly in a self-sufficient residential community and wore the traditional Indian dhoti          and shawl, woven with yarn hand-spun on a charkha. He ate simple vegetarian food, and also undertook long fasts as a means of both          self-purification and political protest.
" + "
" + "Gandhi's vision of an independent India based on religious pluralism was challenged in          the early 1940s by a new Muslim nationalism which was demanding a separate Muslim homeland carved out of India.[12] In August 1947, Britain          granted independence, but the British Indian Empire[12] was partitioned into two dominions, a Hindu-majority India and Muslim-majority Pakistan.[13]          As many displaced Hindus, Muslims, and Sikhs made their way to their new lands, religious violence broke out, especially in the Punjab and Bengal.          Eschewing the official celebration of independence in Delhi, Gandhi visited the affected areas, attempting to provide solace. In the months following,          he undertook several fasts unto death to stop religious violence. The last of these, undertaken on 12 January 1948 when he was 78,[14] also had          the indirect goal of pressuring India to pay out some cash assets owed to Pakistan.[14] Some Indians thought Gandhi was too accommodating.[14][15]          Among them was Nathuram Godse, a Hindu nationalist, who assassinated Gandhi on 30 January 1948 by firing three bullets into his chest.[15";       textView.setText(para);       textView.setMovementMethod(newScrollingMovementMethod());    }

步骤 4 - 向 androidManifest.xml 中添加以下代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

让我们尝试运行您的应用程序。我认为您已经将您的 Android 移动设备连接到了您的计算机。要从 Android Studio 中运行该应用程序,打开您的某个项目活动文件,然后单击工具栏中的运行  图标。选择您的移动设备作为选项,然后检查将显示您的默认屏幕的移动设备 -

单击 此处 下载项目代码。

更新日期: 02-08-2019

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