View之Chronometer计时器

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Chronometer

2016/2/1 9:45:09

1.布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:padding="4dip"    android:gravity="center_horizontal"    android:layout_width="match_parent"    android:layout_height="match_parent">    <Chronometer android:id="@+id/chronometer"        android:format="@string/chronometer_initial_format"  //设置显示格式        <!--<string name="chronometer_initial_format">Initial format: <xliff:g id="initial-format">%s</xliff:g></string> -->        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="0"        android:paddingBottom="30dip"        android:paddingTop="30dip"        />    <Button android:id="@+id/start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/chronometer_start">        <requestFocus />    </Button>    <Button android:id="@+id/stop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/chronometer_stop">    </Button>    <Button android:id="@+id/reset"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/chronometer_reset">    </Button>    <Button android:id="@+id/set_format"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/chronometer_set_format">    </Button>    <Button android:id="@+id/clear_format"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/chronometer_clear_format">    </Button></LinearLayout>

2.实现

public class MyActivity extends Activity {

    private Chronometer mChronometer;    /**     * Called when the activity is first created.     */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.chronometer);        Button button;        mChronometer = (Chronometer) findViewById(R.id.chronometer);        // Watch for button clicks.        button = (Button) findViewById(R.id.start);        button.setOnClickListener(mStartListener);        button = (Button) findViewById(R.id.stop);        button.setOnClickListener(mStopListener);        button = (Button) findViewById(R.id.reset);        button.setOnClickListener(mResetListener);        button = (Button) findViewById(R.id.set_format);        button.setOnClickListener(mSetFormatListener);        button = (Button) findViewById(R.id.clear_format);        button.setOnClickListener(mClearFormatListener);    }    View.OnClickListener mStartListener = new OnClickListener() {        public void onClick(View v) {            //开始计时            mChronometer.start();        }    };    View.OnClickListener mStopListener = new View.OnClickListener() {        public void onClick(View v) {            //停止计时            mChronometer.stop();        }    };    View.OnClickListener mResetListener = new OnClickListener() {        public void onClick(View v) {            //重置            mChronometer.setBase(SystemClock.elapsedRealtime());        }    };    View.OnClickListener mSetFormatListener = new OnClickListener() {        public void onClick(View v) {            //设置计时器显示格式            mChronometer.setFormat("Formatted time (%s)");        }    };    View.OnClickListener mClearFormatListener = new OnClickListener() {        public void onClick(View v) {            //清除显示格式            mChronometer.setFormat(null);        }    };}

3.效果

这里写图片描述

格式化

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