Android我自己的简易（秒表）计时器Chronometer

Android我自己的简易（秒表）计时器Chronometer

就是一个简单的计时器

布局文件：activity_main.xml

<LinearLayout 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:orientation="vertical"
tools:context=".MainActivity">


<Chronometer
 android:id="@+id/chronometer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#ff0000"
android:textSize="60dip" />

<LinearLayout
 android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dip"
android:orientation="horizontal">

<Button
 android:id="@+id/btnStart"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="开始记时" />

<Button
 android:id="@+id/btnStop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="停止记时" />

<Button
 android:id="@+id/btnReset"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="重置" />

<Button
 android:id="@+id/btn_format"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="格式化" />
</LinearLayout>

</LinearLayout>

展示视图控制文件：MainActivity

package run.yang.com.chronometerdemo;

import android.os.Bundle;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener,Chronometer.OnChronometerTickListener{

private Chronometer chronometer;
private Button btn_start,btn_stop,btn_base,btn_format;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

private void initView() {
        chronometer = (Chronometer) findViewById(R.id.chronometer);
        btn_start = (Button) findViewById(R.id.btnStart);
        btn_stop = (Button) findViewById(R.id.btnStop);
        btn_base = (Button) findViewById(R.id.btnReset);
        btn_format = (Button) findViewById(R.id.btn_format);

        chronometer.setOnChronometerTickListener(this);
        btn_start.setOnClickListener(this);
        btn_stop.setOnClickListener(this);
        btn_base.setOnClickListener(this);
        btn_format.setOnClickListener(this);

    }

@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btnStart:
                chronometer.start();// 开始计时
break;
case R.id.btnStop:
                chronometer.stop();// 停止计时
break;
case R.id.btnReset:
                chronometer.setBase(SystemClock.elapsedRealtime());// 复位
break;
case R.id.btn_format:
                chronometer.setFormat("T：%s");// 更改时间显示格式
break;
        }
    }

@Override
public void onChronometerTick(Chronometer chronometer) {
        String time = chronometer.getText().toString();
if(time.equals("00:00")){
            Toast.makeText(MainActivity.this,"时间到了~", Toast.LENGTH_SHORT).show();
        }
    }
}

本文参考学习：

http://blog.csdn.net/coder_pig/article/details/47977359