我有两个数组，我想设置动态长度。每个长度来自数据库中的行数。
我有一个本地类，它扩展了名为array1的Thread，它获取了数据库中的行数，并创建了一个名为b的数组，其长度是类array1的输出和我从数组Cat_Name获取数据并将其设置在数组b上。但是当我将b传递给显示数据的main1类时，它会指出array1值为空。
public class Main extends Activity {
private static final String TAG = "NoBoringActionBarActivity";
private int mActionBarTitleColor;
private int mActionBarHeight;
private int mHeaderHeight;
private int mMinHeaderTranslation;
private ListView mListView;
public KenBurnsView mHeaderPicture;
private ImageView mHeaderLogo;
private View mHeader;
private View mPlaceHolderView;
private AccelerateDecelerateInterpolator mSmoothInterpolator;
private RectF mRect1 = new RectF();
private RectF mRect2 = new RectF();
private AlphaForegroundColorSpan mAlphaForegroundColorSpan;
private SpannableString mSpannableString;
private TypedValue mTypedValue = new TypedValue();
String [] s1=new String [1];
String [] logo =new String [8];//={R.drawable.accessories,R.drawable.accessories,R.drawable.accessories,R.drawable.accessories,R.drawable.accessories,R.drawable.accessories,R.drawable.accessories,R.drawable.accessories};// {"http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png","http://192.168.43.16/marche/accessories.png"};
String [] Cat_Name=new String [8];//={"accessories","clothes","glasses","Laptob","mobiles","perfum","toys","watches"};
private static final int MENU_VIEW1 = Menu.FIRST;
private static final int MENU_UPLOAD = Menu.FIRST +1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
array1 www=new array1();
www.start();
Sendfeed1 pro1=new Sendfeed1();
pro1.start();
Sendfeed pro=new Sendfeed();
pro.start();
mSmoothInterpolator = new AccelerateDecelerateInterpolator();
mHeaderHeight = getResources().getDimensionPixelSize(R.dimen.header_height);
mMinHeaderTranslation = -mHeaderHeight + getActionBarHeight();
mListView = (ListView) findViewById(R.id.listview);
mHeader = findViewById(R.id.header);
mHeaderPicture = (KenBurnsView) findViewById(R.id.header_picture);
mHeaderPicture.setResourceIds(R.drawable.picture0, R.drawable.picture1);
mHeaderLogo = (ImageView) findViewById(R.id.header_logo);
mActionBarTitleColor = getResources().getColor(R.color.actionbar_title_color);
mSpannableString = new SpannableString(getString(R.string.noboringactionbar_title));
mAlphaForegroundColorSpan = new AlphaForegroundColorSpan(mActionBarTitleColor);
setupActionBar();
setupListView();
// ImageButton im = new ImageButton(context);
}
public class Sendfeed extends Thread{
String page="";
public void run(){
BufferedReader in = null;
try {
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost("http://192.168.43.16/marche/category_display.php");
HttpResponse response = client.execute(request);
in = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
page = sb.toString();
String [] s= page.split(System.getProperty("line.separator"));
for(int i=0;i<s.length;i++){
Cat_Name[i]=s[i];
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
public class Sendfeed1 extends Thread{
String page="";
public void run(){
BufferedReader in = null;
try {
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost("http://192.168.43.16/marche/categoryIcon_display.php");
HttpResponse response = client.execute(request);
in = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
page = sb.toString();
String [] s= page.split(System.getProperty("line.separator"));
for(int i=0;i<s.length;i++){
logo[i]=s[i];
// System.out.println(logo[i]);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
public class array1 extends Thread{
String page="";
public void run(){
BufferedReader in = null;
try {
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost("http://192.168.43.16/marche/arraysize.php");
HttpResponse response = client.execute(request);
in = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
page = sb.toString();
s1= page.split(System.getProperty("line.separator"));
System.out.println(s1.length);
System.out.println(s1[0]);
System.out.println(Integer.parseInt(s1[0]));
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int itemId = item.getItemId();
switch (itemId) {
case android.R.id.home:
//do your action here.
Toast.makeText(this, "home pressed", Toast.LENGTH_LONG).show();
break;
}
return true;
}
private void setupListView() {
ArrayList<String> FAKES = new ArrayList<String>();
getLayoutInflater().inflate(R.layout.view_header_placeholder, mListView, false);
mListView.addHeaderView(mPlaceHolderView);
int iii=Integer.parseInt(s1[0]);
String [] b = Arrays.copyOf(Cat_Name, iii);
System.out.println(iii+"hhhhhh");
Main1 adapter = new Main1(Main.this, b, logo);
mListView.setAdapter(adapter);
// mListView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, FAKES));
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// Toast.makeText(Main.this, "You Clicked at " +Cat_Name[ position-1], Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Main.this,Shops.class);
intent.putExtra("the shop category", Cat_Name[position-1]);
startActivity(intent);
}
});
mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int scrollY = getScrollY();
//sticky actionbar
mHeader.setTranslationY(Math.max(-scrollY, mMinHeaderTranslation));
//header_logo --> actionbar icon
float ratio = clamp(mHeader.getTranslationY() / mMinHeaderTranslation, 0.0f, 1.0f);
interpolate(mHeaderLogo, getActionBarIconView(), mSmoothInterpolator.getInterpolation(ratio));
//actionbar title alpha
//getActionBarTitleView().setAlpha(clamp(5.0F * ratio - 4.0F, 0.0F, 1.0F));
//---------------------------------
//better way thanks to @cyrilmottier
setTitleAlpha(clamp(5.0F * ratio - 4.0F, 0.0F, 1.0F));
}
});
}
private void setTitleAlpha(float alpha) {
mAlphaForegroundColorSpan.setAlpha(alpha);
mSpannableString.setSpan(mAlphaForegroundColorSpan, 0, mSpannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
getActionBar().setTitle(mSpannableString);
}
public static float clamp(float value, float min, float max) {
return Math.max(min,Math.min(value, max));
}
private void interpolate(View view1, View view2, float interpolation) {
getOnScreenRect(mRect1, view1);
getOnScreenRect(mRect2, view2);
float scaleX = 1.0F + interpolation * (mRect2.width() / mRect1.width() - 1.0F);
float scaleY = 1.0F + interpolation * (mRect2.height() / mRect1.height() - 1.0F);
float translationX = 0.5F * (interpolation * (mRect2.left + mRect2.right - mRect1.left - mRect1.right));
float translationY = 0.5F * (interpolation * (mRect2.top + mRect2.bottom - mRect1.top - mRect1.bottom));
view1.setTranslationX(translationX);
view1.setTranslationY(translationY - mHeader.getTranslationY());
view1.setScaleX(scaleX);
view1.setScaleY(scaleY);
}
private RectF getOnScreenRect(RectF rect, View view) {
rect.set(view.getLeft(), view.getTop(), view.getRight(), view.getBottom());
return rect;
}
public int getScrollY() {
View c = mListView.getChildAt(0);
if (c == null) {
return 0;
}
int firstVisiblePosition = mListView.getFirstVisiblePosition();
int top = c.getTop();
int headerHeight = 0;
if (firstVisiblePosition >= 1) {
headerHeight = mPlaceHolderView.getHeight();
}
return -top + firstVisiblePosition * c.getHeight() + headerHeight;
}
private void setupActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setIcon(R.drawable.ic_transparent);
actionBar.setDisplayHomeAsUpEnabled(true);
//getActionBarTitleView().setAlpha(0f);
}
private ImageView getActionBarIconView() {
return (ImageView) findViewById(android.R.id.home);
}
/*private TextView getActionBarTitleView() {
int id = Resources.getSystem().getIdentifier("action_bar_title", "id", "android");
return (TextView) findViewById(id);
}*/
public int getActionBarHeight() {
if (mActionBarHeight != 0) {
return mActionBarHeight;
}
getTheme().resolveAttribute(android.R.attr.actionBarSize, mTypedValue, true);
mActionBarHeight = TypedValue.complexToDimensionPixelSize(mTypedValue.data, getResources().getDisplayMetrics());
return mActionBarHeight;
}
public boolean onCreateOptionsMenu1(Menu menu) {
menu.add(0, MENU_VIEW1, 0, "Logout");
menu.add(0, MENU_UPLOAD, 0, "Help");
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case MENU_VIEW1:
// Code for menu option View
Intent intent = new Intent(Main.this,Main.class);
startActivity(intent);
return true;
case MENU_UPLOAD:
// Code for menu option Upload
return true;
default:
return false;
}
}
@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;
}
}
我的问题是，课程array1的执行迟到了，我不知道为什么。
答案 0 :(得分：0)
强烈建议不要在Android中处理Java线程，为什么不使用AsyncTask？为什么不尝试改造http://square.github.io/retrofit/来调用您的Web服务？这只是一个建议