Android Multifunctional Clock Development Case (Basic)
- 2021-07-18 09:01:56
- OfStack
In this article, we enter the practical study of Android multifunctional clock development. The specific effect can refer to the clock on the mobile phone, as follows
First let's look at the layout file layout_main. xml
Overall layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.clock.TimeView
android:id="@+id/tabTime"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</com.example.clock.TimeView>
<com.example.clock.AlarmView
android:id="@+id/tabAlarm"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<span style="white-space:pre"> </span> ...
</com.example.clock.AlarmView>
<com.example.clock.TimerView
android:id="@+id/tabTimer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<span style="white-space:pre"> </span> ...
</com.example.clock.TimerView>
<com.example.clock.StopWatchView
android:id="@+id/tabStopWatch"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<span style="white-space:pre"> </span> ...
</com.example.clock.StopWatchView>
</FrameLayout>
</LinearLayout>
</TabHost>
</FrameLayout> The whole layout is an FrameLayout, and we put an TabHost in it. Next, we can directly add the layout we want. Maybe beginners will have a question at the beginning of 1, that is, < com. example. clock... > < /com. example. clock... > What is this thing? ? This is a custom control, and we created a class that inherits from LinearLayout (see here//www. ofstack. com/article/85515. htm for explanation). We saw four such tags above, indicating that we have four such Tab pages. About the layout of things here is not much to talk about, after I will be in the process of learning 1 do not understand, and related knowledge points uploaded to the resources, you can download to see.
Complete layout file code:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.clock.TimeView
android:id="@+id/tabTime"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tvTime"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
</com.example.clock.TimeView>
<com.example.clock.AlarmView
android:id="@+id/tabAlarm"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lvListAlarm"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</ListView>
<Button
android:id="@+id/btnAddAlarm"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/add_alarm" >
</Button>
</com.example.clock.AlarmView>
<com.example.clock.TimerView
android:id="@+id/tabTimer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal" >
<EditText
android:id="@+id/etHour"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="number"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=":"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/etMin"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="number"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=":"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/etSec"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="number"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:id="@+id/btnGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/btnStart"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/start" />
<Button
android:id="@+id/btnPause"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/pause" />
<Button
android:id="@+id/btnResume"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/resume" />
<Button
android:id="@+id/btnReset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/reset" />
</LinearLayout>
</com.example.clock.TimerView>
<com.example.clock.StopWatchView
android:id="@+id/tabStopWatch"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/timeHour"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=":"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/timeMin"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=":"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/timeSec"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="."
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/timeMsec"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<ListView
android:id="@+id/lvWatchTime"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</ListView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/btnSWStart"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/start" />
<Button
android:id="@+id/btnSWPause"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/pause" />
<Button
android:id="@+id/btnSWResume"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/resume" />
<Button
android:id="@+id/btnSWLap"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/lap" />
<Button
android:id="@+id/btnSWReset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/reset" />
</LinearLayout>
</com.example.clock.StopWatchView>
</FrameLayout>
</LinearLayout>
</TabHost>
</FrameLayout> Having finished the layout, let's talk about MainActivity
private TabHost tabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tabHost = (TabHost) findViewById(android.R.id.tabhost);
tabHost.setup();
// For TabHost Add Label
// New 1 A newTabSpec(newTabSpec) Object used to specify the label id Which is used to distinguish labels
// Set its labels and charts (setIndicator)
// Setting content (setContent)
/*
* Settings tab : -- Set button name : setIndicator( Clock ); -- Setting tab contents : setContent(),
* You can set the view component , You can set Activity, You can also set the Fragement;
*/
tabHost.addTab(tabHost.newTabSpec("tabTime").setIndicator(" Clock ")
.setContent(R.id.tabTime));
tabHost.addTab(tabHost.newTabSpec("tabAlarm").setIndicator(" Alarm clock ")
.setContent(R.id.tabAlarm));
tabHost.addTab(tabHost.newTabSpec("tabTimer").setIndicator(" Timer ")
.setContent(R.id.tabTimer));
tabHost.addTab(tabHost.newTabSpec("tabStopWatch").setIndicator(" Stopwatch ")
.setContent(R.id.tabStopWatch));
}
The main operation in MainActivity is to set TabHost. The explanation has been posted in the above code, so we won't talk about it here. In the next article, we will focus on the four parts of clock, alarm clock, timer and stopwatch. I hope everyone will continue to learn.
The above is the whole content of this article, hoping to help everyone learn Android software programming.