我知道,我知道,这里有很多关于这个特殊问题的帖子,但是,大多数都非常过时,而且没有一个符合我写这个应用程序的方式......我很新编码,我自己这样做,所以我需要帮助,告诉我如何使用我拥有的,并让计时器显示毫秒!
这是我的Java:
package com.jackson.eason.stopwatch;
import android.app.Activity;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Chronometer;
public class MainActivity extends Activity {
Chronometer mChronometer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get references to views
mChronometer = (Chronometer) findViewById(R.id.chronometer);
Button button1 = (Button) findViewById(R.id.start);
Button button2 = (Button) findViewById(R.id.stop);
Button button3 = (Button) findViewById(R.id.reset);
Button button4 = (Button) findViewById(R.id.set_format);
Button button5 = (Button) findViewById(R.id.clear_format);
// Declare the listeners
View.OnClickListener mStartListener = new OnClickListener() {
public void onClick(View v) {
mChronometer.start();
}
};
View.OnClickListener mStopListener = new OnClickListener() {
public void onClick(View v) {
mChronometer.stop();
}
};
View.OnClickListener mResetListener = new OnClickListener() {
public void onClick(View v) {
mChronometer.setBase
(SystemClock.elapsedRealtime());
}
};
// You forgot to declare a listener for set format in your updated code
View.OnClickListener mSetFormatListener = new OnClickListener() {
public void onClick(View v) {
mChronometer.setFormat("Formatted time (%s)");
}
};
View.OnClickListener mClearFormatListener = new OnClickListener() {
public void onClick(View v) {
mChronometer.setFormat(null);
}
};
//Assign listeners to your buttons
button1.setOnClickListener(mStartListener);
button2.setOnClickListener(mStopListener);
button3.setOnClickListener(mResetListener);
button4.setOnClickListener(mSetFormatListener);
button5.setOnClickListener(mClearFormatListener);
}
}
此外,如果需要,这是我的主XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="4dip"
android:gravity="center_horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:clickable="true"
android:background="#ff4f4a53">
<Chronometer android:id="@+id/chronometer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="30dip"
android:paddingTop="30dip"
android:focusableInTouchMode="true"
android:textSize="55sp"
android:textIsSelectable="false"
android:typeface="serif"
android:textColor="#fffcfffa" />
<Button android:id="@+id/start"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="start"
android:background="#ff5effab"
android:elegantTextHeight="false"
android:layout_gravity="center_horizontal">
<requestFocus />
</Button>
<Button android:id="@+id/stop"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="stop"
android:background="#fffe7c5b">
</Button>
<Button android:id="@+id/reset"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:text="reset"
android:layout_gravity="center_horizontal"
android:textColor="#fffffcfe">
</Button>
<Button android:id="@+id/clear_format"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:text="clear"
android:layout_gravity="center_horizontal"
android:textColor="#fffefdff">
</Button>
<Button android:id="@+id/set_format"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:text="format"
android:layout_gravity="center_horizontal"
android:textColor="#ffffffff">
</Button>
</LinearLayout>
非常感谢任何帮助!