在我的刷新方法中，我清除了TableRow元素，为新的按钮数组腾出空间，并尝试清除TableLayout，为新近更新的TableRows腾出空间，但我一直收到一条错误，说TableLayout没有被清除。它会出现在table.remveAllViews（）;没有工作。
MainActivity.java：
package com.example.tilegame;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TableRow.LayoutParams;
public class MainActivity extends ActionBarActivity implements OnClickListener
{
TableLayout table;
Button buttons[];
int count = 0;
int btnSize = 0;
TableRow row;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSize = (int)getResources().getDimension(R.dimen.box_size);
table = (TableLayout)findViewById(R.id.table);
buttons = new Button[9];
row = new TableRow(this);
for(int x = 0; x < 9; x++)
{
if(x < 8)
{
Button btn = createButton(btnSize, false, x+1);
buttons[x] = btn;
}
else if(x == 8)
{
Button btn = createButton(btnSize, true, x+1);
buttons[x] = btn;
}
}
randomizeArray(buttons);
table.removeAllViews();
for(int x = 0; x < 3; x++)
{
TableRow row = new TableRow(this);
for(int y = 0; y < 3; y++)
{
row.addView(buttons[count]);
count++;
}
table.addView(row, x);
}
}
public void onClick(View v)
{
switch(v.getId())
{
case 0:
swap(buttons, v.getId());
refresh();
break;
case 1:
swap(buttons, v.getId());
refresh();
break;
case 2:
swap(buttons, v.getId());
refresh();
break;
case 3:
swap(buttons, v.getId());
refresh();
break;
case 4:
swap(buttons, v.getId());
refresh();
break;
case 5:
swap(buttons, v.getId());
refresh();
break;
case 6:
swap(buttons, v.getId());
refresh();
break;
case 7:
swap(buttons, v.getId());
refresh();
break;
}
}
public Button createButton(int size, boolean blank, int id)
{
Button btn = new Button(this);
LayoutParams buttonParams = new LayoutParams(size, size);
buttonParams.setMargins(5,5,5,5);
btn.setLayoutParams(buttonParams);
btn.setId(id);
btn.setText(""+btn.getId());
btn.setOnClickListener(this);
if(blank == false)
{
btn.setBackgroundColor(Color.parseColor("#ffffff"));
}
else
{
btn.setVisibility(View.INVISIBLE);
}
return btn;
}
public void randomizeArray(Button[] array)
{
List<Button> list = new ArrayList<>();
for(Button i : array)
{
list.add(i);
}
Collections.shuffle(list);
for(int x = 0; x < list.size(); x++)
{
array[x] = list.get(x);
}
}
public void refresh()
{
for(int x = 0; x < 3; x++)
{
View child = table.getChildAt(x);
if(child instanceof TableRow)
{
((ViewGroup) child).removeAllViews();
}
}
table.removeAllViews();
count = 0;
for(int x = 0; x < 3; x++)
{
for(int y = 0; y < 3; y++)
{
row.addView(buttons[count]);
count++;
}
table.addView(row, x);
}
}
public void swap(Button btns[], int id)
{
int posClick = 0;
int posBlank = 0;
Button temp1 = new Button(this);
Button temp2 = new Button(this);
for(int x = 0; x < btns.length; x++)
{
if(Integer.parseInt(btns[x].getText().toString()) == id)
{
posClick = x;
}
}
for(int x = 0; x < btns.length; x++)
{
if(Integer.parseInt(btns[x].getText().toString()) == 9)
{
posBlank = x;
}
}
switch(posClick)
{
case 0:
if(posBlank == 1 || posBlank == 3)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 1:
if(posBlank == 0 || posBlank == 2 || posBlank == 4)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 2:
if(posBlank == 1 || posBlank == 5)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 3:
if(posBlank == 0 || posBlank == 4 || posBlank == 6)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 4:
if(posBlank == 1 || posBlank == 3 || posBlank == 5 || posBlank == 7)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 5:
if(posBlank == 2 || posBlank == 4 || posBlank == 8)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 6:
if(posBlank == 3 || posBlank == 7)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
case 7:
if(posBlank == 4 || posBlank == 6 || posBlank == 8)
{
temp1 = btns[posClick];
temp2 = btns[posBlank];
btns[posBlank] = temp1;
btns[posClick] = temp2;
}
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings)
{
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_main.xml中：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/outside"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.tilegame.MainActivity" >
<TableLayout
android:id="@+id/table"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#38c0f4"
android:layout_gravity="center|top" >
<TableRow
android:id="@+id/row1">
<Button
android:id="@+id/num_1"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:background="#FFFFFF"
android:layout_weight="1"
android:layout_margin="5dip"
android:text="@string/num_1">
</Button>
<Button
android:id="@+id/num_2"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:background="#FFFFFF"
android:layout_weight="1"
android:layout_margin="5dip"
android:text="@string/num_2">
</Button>
<Button
android:id="@+id/num_3"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:background="#FFFFFF"
android:layout_weight="1"
android:layout_margin="5dip"
android:text="@string/num_3">
</Button>
</TableRow>
<TableRow
android:id="@+id/row2">
<Button
android:id="@+id/num_4"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:layout_margin="5dip"
android:layout_weight="1"
android:background="#FFFFFF"
android:text="@string/num_4" />
<Button
android:id="@+id/num_5"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:layout_margin="5dip"
android:layout_weight="1"
android:background="#FFFFFF"
android:text="@string/num_5" />
<Button
android:id="@+id/num_6"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:layout_margin="5dip"
android:layout_weight="1"
android:background="#FFFFFF"
android:text="@string/num_6" />
</TableRow>
<TableRow
android:id="@+id/row3">
<Button
android:id="@+id/num_7"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:background="#FFFFFF"
android:layout_weight="1"
android:layout_margin="5dip"
android:text="@string/num_7">
</Button>
<Button
android:id="@+id/num_8"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:background="#FFFFFF"
android:layout_weight="1"
android:layout_margin="5dip"
android:text="@string/num_8">
</Button>
<Button
android:id="@+id/blank"
android:layout_width="@dimen/box_size"
android:layout_height="@dimen/box_size"
android:visibility="invisible"
android:layout_weight="1"
android:layout_margin="5dip">
</Button>
</TableRow>
</TableLayout>
</LinearLayout>
Log Cat（喵）：
10-04 03:07:10.187: E/AndroidRuntime(11284): FATAL EXCEPTION: main
10-04 03:07:10.187: E/AndroidRuntime(11284): Process: com.example.tilegame, PID: 11284
10-04 03:07:10.187: E/AndroidRuntime(11284): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.view.ViewGroup.addViewInner(ViewGroup.java:3771)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.view.ViewGroup.addView(ViewGroup.java:3624)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.widget.TableLayout.addView(TableLayout.java:429)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.view.ViewGroup.addView(ViewGroup.java:3569)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.widget.TableLayout.addView(TableLayout.java:411)
10-04 03:07:10.187: E/AndroidRuntime(11284): at com.example.tilegame.MainActivity.refresh(MainActivity.java:167)
10-04 03:07:10.187: E/AndroidRuntime(11284): at com.example.tilegame.MainActivity.onClick(MainActivity.java:107)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.view.View.performClick(View.java:4640)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.view.View$PerformClick.run(View.java:19421)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.os.Handler.handleCallback(Handler.java:733)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.os.Handler.dispatchMessage(Handler.java:95)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.os.Looper.loop(Looper.java:136)
10-04 03:07:10.187: E/AndroidRuntime(11284): at android.app.ActivityThread.main(ActivityThread.java:5476)
10-04 03:07:10.187: E/AndroidRuntime(11284): at java.lang.reflect.Method.invokeNative(Native Method)
10-04 03:07:10.187: E/AndroidRuntime(11284): at java.lang.reflect.Method.invoke(Method.java:515)
10-04 03:07:10.187: E/AndroidRuntime(11284): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
10-04 03:07:10.187: E/AndroidRuntime(11284): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
10-04 03:07:10.187: E/AndroidRuntime(11284): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
在你的oncreate中你正在做
for(int x = 0; x < 3; x++)
{
TableRow row = new TableRow(this);
for(int y = 0; y < 3; y++)
{
row.addView(buttons[count]);
count++;
}
table.addView(row, x);
}
但您的刷新代码包含：
for(int x = 0; x < 3; x++)
{
for(int y = 0; y < 3; y++)
{
row.addView(buttons[count]);
count++;
}
table.addView(row, x);
}
由于在这种情况下您没有创建本地行对象，因此您尝试将类行变量多次添加到刷新表中。最好删除TableRow行;来自您的类，因为您对方法变量使用相同的命名约定，并且没有在我可以看到的任何地方使用类作用域row。