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Chronometer Tutorial
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<?xml version="1.0" encoding="utf-8"?> | |
<LinearLayout 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" | |
android:gravity="center" | |
android:orientation="vertical" | |
tools:context="com.codinginflow.chronometerexample.MainActivity"> | |
<Chronometer | |
android:id="@+id/chronometer" | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:textSize="30sp" /> | |
<Button | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:onClick="startChronometer" | |
android:text="Start" /> | |
<Button | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:onClick="pauseChronometer" | |
android:text="Pause" /> | |
<Button | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:onClick="resetChronometer" | |
android:text="Reset" /> | |
</LinearLayout> |
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package com.codinginflow.chronometerexample; | |
import android.os.SystemClock; | |
import android.support.v7.app.AppCompatActivity; | |
import android.os.Bundle; | |
import android.view.View; | |
import android.widget.Chronometer; | |
import android.widget.Toast; | |
public class MainActivity extends AppCompatActivity { | |
private Chronometer chronometer; | |
private long pauseOffset; | |
private boolean running; | |
@Override | |
protected void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
setContentView(R.layout.activity_main); | |
chronometer = findViewById(R.id.chronometer); | |
chronometer.setFormat("Time: %s"); | |
chronometer.setBase(SystemClock.elapsedRealtime()); | |
chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() { | |
@Override | |
public void onChronometerTick(Chronometer chronometer) { | |
if ((SystemClock.elapsedRealtime() - chronometer.getBase()) >= 10000) { | |
chronometer.setBase(SystemClock.elapsedRealtime()); | |
Toast.makeText(MainActivity.this, "Bing!", Toast.LENGTH_SHORT).show(); | |
} | |
} | |
}); | |
} | |
public void startChronometer(View v) { | |
if (!running) { | |
chronometer.setBase(SystemClock.elapsedRealtime() - pauseOffset); | |
chronometer.start(); | |
running = true; | |
} | |
} | |
public void pauseChronometer(View v) { | |
if (running) { | |
chronometer.stop(); | |
pauseOffset = SystemClock.elapsedRealtime() - chronometer.getBase(); | |
running = false; | |
} | |
} | |
public void resetChronometer(View v) { | |
chronometer.setBase(SystemClock.elapsedRealtime()); | |
pauseOffset = 0; | |
} | |
} |
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