时钟控件(AnalogClock和TextClock)－Android开发

简单的示例代码：

首先，使用Android Stuidio创建一个空项目。

创建基本的UI界面，activity_main.xml：

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<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.topspeedsnail.clock.MainActivity">
 
    <TextClock
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textClock"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="143dp" />
 
    <AnalogClock
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/analogClock"
        android:layout_marginTop="82dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:visibility="invisible" />
 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="切换"
        android:id="@+id/button"
        android:layout_below="@+id/analogClock"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

MainActivity.java 中的代码：

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package com.topspeedsnail.clock;
 
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.AnalogClock;
import android.widget.Button;
import android.widget.TextClock;
import android.view.View;
 
public class MainActivity extends AppCompatActivity {
 
    static private Button swap;
 
    static private TextClock textClock;
    static private AnalogClock analogClock;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        swap = (Button) findViewById(R.id.button);
 
        textClock = (TextClock) findViewById(R.id.textClock);
        analogClock = (AnalogClock) findViewById(R.id.analogClock);
 
        swap.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
 
                if (textClock.getVisibility() == TextClock.VISIBLE ) {
                    textClock.setVisibility(TextClock.INVISIBLE);
                    analogClock.setVisibility(AnalogClock.VISIBLE);
                }
                else {
                    textClock.setVisibility(TextClock.VISIBLE);
                    analogClock.setVisibility(AnalogClock.INVISIBLE);
                }
            }
        });
 
    }
}

运行：

时钟控件(AnalogClock和TextClock)－Android开发

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时钟控件(AnalogClock和TextClock)－Android开发

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