我是Android和Java的新手，我在使用Thread.sleep函数时遇到了麻烦。我的程序是一个简单的游戏，几乎就像有两个玩家的乒乓球。代码不完整但Thread没有正常工作。我正在更改边距以移动球。由于某些异常而导致catch块被运行＆gt;我的代码如下：
package com.example.game;
import android.app.Activity;
import android.app.Activity;
import android.content.Context;
import android.graphics.Point;
import android.os.Bundle;
import android.view.Display;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity {
private int x1=0,x2=0,m=150;
public int height;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Display display = getWindowManager().getDefaultDisplay();
Point size= new Point();
display.getSize(size);
// int width = size.x;
height = size.y;
showview2();
showview1();
game();
}
public void game()
{
buttonSetup1_rig();
buttonSetup1_lef();
buttonSetup2_rig();
buttonSetup2_lef();
//while(m>=0)
for(int i=0;i<150;i++)
{
showball();
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(500);
m=m-10;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
}
protected void buttonSetup1_rig()
{
ImageButton ticon=(ImageButton)findViewById(R.id.imageButton2);
ticon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(x1<(height-320))
x1=x1+10;
showview1();
}
});
}
protected void buttonSetup1_lef()
{
ImageButton ticon=(ImageButton)findViewById(R.id.imageButton1);
ticon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(x1>(0))
x1=x1-10;
showview1();
}
});
}
protected void buttonSetup2_rig()
{
ImageButton ticon=(ImageButton)findViewById(R.id.imageButton6);
ticon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(x2<(height-320))
x2=x2+10;
showview2();
}
});
}
protected void buttonSetup2_lef()
{
ImageButton ticon=(ImageButton)findViewById(R.id.imageButton4);
ticon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if(x2>(0))
x2=x2-10;
showview2();
}
});
}
public void showview1()
{
ImageView image=(ImageView)findViewById(R.id.imageView1);
LinearLayout.LayoutParams lp ;
lp=(LinearLayout.LayoutParams)(image.getLayoutParams());
lp.setMargins(x1,0,0,0);
image.setLayoutParams(lp);
}
public void showview2()
{
ImageView image=(ImageView)findViewById(R.id.imageView2);
LinearLayout.LayoutParams lp ;
lp=(LinearLayout.LayoutParams)(image.getLayoutParams());
lp.setMargins(x2,0,0,0);
image.setLayoutParams(lp);
}
public void showball()
{
ImageView img=(ImageView)findViewById(R.id.imageView3);
LinearLayout.LayoutParams l ;
l=(LinearLayout.LayoutParams)(img.getLayoutParams());
int leftMargin = l.leftMargin;
int rightMargin = l.rightMargin;
int topMargin = l.topMargin;
l.setMargins(m,0,m,0);
img.setLayoutParams(l);
}
}
我的Xml是：
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="400dp" >
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_above="@+id/relativeLayout2"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true" >
<ImageButton
android:id="@+id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="@drawable/left" />
<ImageButton
android:id="@+id/imageButton5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="@drawable/ic_launcher" />
<ImageButton
android:id="@+id/imageButton6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:src="@drawable/right" />
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="350dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_below="@+id/relativeLayout1" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/lc" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="wrap_content"
android:layout_height="280dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/linearLayout1"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="120dp"
android:layout_marginTop="140dp"
android:src="@drawable/untitled" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/linearLayout2"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="64dp"
android:src="@drawable/lc" />
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="49dp"
android:layout_weight="2.25" >
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="@drawable/left" />
<ImageButton
android:id="@+id/imageButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/imageButton1"
android:layout_alignParentRight="true"
android:src="@drawable/right" />
<ImageButton
android:id="@+id/imageButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="@drawable/ic_launcher" />
</RelativeLayout>