如何在android中從數據庫獲取的文本視圖中設置值？
[英]How to set the value in text view getting from database in android?
問題描述
我根據 Sqlite 數據庫中的位置存儲值
我正在從數據庫中檢索值並且該值顯示正確。但是當我在文本視圖中顯示該值時它變為零。
請幫忙。
這是我的代碼：
public class BabyWearAdapter extends BaseAdapter {
ArrayList<String> p_id;
ArrayList<String> p_name;
Context context;
ArrayList<String> imageId;
ArrayList<String> wash_v;
ArrayList<String> dry_v;
ArrayList<String> iron_v;
Typeface tf;
ProgressDialog dialog;
Intent i;
float washItemCount = 0.0f;
String iconName;
Vector<BasketDO> vecBasket = new Vector<BasketDO>();
int countVal1, countVal2, countVal3;
public ImageLoader imageLoader;
int KEY, pid;
String TNAME;
DBHandler dbHandler;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
HashMap<Integer, Integer> launDry = new HashMap<Integer, Integer>();
HashMap<Integer, Integer> stremIron = new HashMap<Integer, Integer>();
HashMap<Integer, Integer> dryCleans = new HashMap<Integer, Integer>();
public static ArrayList<HashMap<Integer, Integer>> mListLaundry = new ArrayList<HashMap<Integer, Integer>>();
public BabyWearAdapter(Context con, ArrayList<String> pid,
ArrayList<String> pname, ArrayList<String> pimg,
ArrayList<String> wash, ArrayList<String> dry,
ArrayList<String> iron) {
p_id = pid;
context = con;
p_name = pname;
imageId = pimg;
wash_v = wash;
dry_v = dry;
iron_v = iron;
imageLoader = new ImageLoader(context);
sharedPreferences = context.getSharedPreferences("prefName",
context.MODE_APPEND);
editor = sharedPreferences.edit();
}
@Override
public int getCount() {
return imageId.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@SuppressLint({ "UseValueOf", "ViewHolder" })
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.dynamic, parent, false);
final LinearLayout ll1 = (LinearLayout) convertView
.findViewById(R.id.ll1);
final LinearLayout ll2 = (LinearLayout) convertView
.findViewById(R.id.ll2);
final LinearLayout ll3 = (LinearLayout) convertView
.findViewById(R.id.ll3);
final TextView tv1 = (TextView) convertView.findViewById(R.id.tv1);
final TextView tv2 = (TextView) convertView.findViewById(R.id.tv3);
final TextView tv3 = (TextView) convertView.findViewById(R.id.tv5);
final ImageView img = (ImageView) convertView
.findViewById(R.id.ivImage);
tv1.setText(wash_v.get(position));
tv2.setText(iron_v.get(position));
tv3.setText(dry_v.get(position));
imageLoader.DisplayImage(imageId.get(position), img);
dbHandler = new DBHandler(context);
int pid = Integer.parseInt(p_id.get(position));
SQLiteDatabase db = null;
db = dbHandler.getReadableDatabase();
i = new Intent("com.example.safewash");
final TextView tvVal = (TextView) convertView.findViewById(R.id.tvVal);
final TextView tvVal1 = (TextView) convertView
.findViewById(R.id.tvVal1);
final TextView tvVal2 = (TextView) convertView
.findViewById(R.id.tvVal2);
ll1.setTag(p_id.get(position));
ll2.setTag(p_id.get(position));
ll3.setTag(p_id.get(position));
Cursor c = db.rawQuery("select * from babywear_tbl where pid =" + pid,
null);
if (c.moveToFirst()) {
String countVal1 = c.getString(c.getColumnIndex("laundry_item"));
String countVal2 = c.getString(c.getColumnIndex("dry_item"));
String countVal3 = c.getString(c.getColumnIndex("iron_item"));
final int count1 =Integer.parseInt(countVal1);
final int count2 =Integer.parseInt(countVal2);
final int count3 =Integer.parseInt(countVal3);
tvVal.setText("" + count1);
tvVal.setVisibility(View.VISIBLE);
System.out.println("The Value one is "+countVal1);
Log.i("Count Val One",""+countVal1);
}
try {
int temp = launDry.get(Integer.parseInt(ll1.getTag().toString()
.trim()));
int val = temp + 1;
tvVal.setText("" + val);
tvVal.setVisibility(View.VISIBLE);
} catch (Exception e) {
tvVal.setText("0");
}
try {
int temp = stremIron.get(Integer.parseInt(ll2.getTag().toString()
.trim()));
int val = temp + 1;
tvVal1.setText("" + val);
tvVal1.setVisibility(View.VISIBLE);
} catch (Exception e) {
tvVal1.setText("0");
}
try {
int temp = dryCleans.get(Integer.parseInt(ll1.getTag().toString()
.trim()));
int val = temp + 1;
tvVal2.setText("" + val);
tvVal2.setVisibility(View.VISIBLE);
} catch (Exception e) {
tvVal2.setText("0");
}
ll1.setOnClickListener(new OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(final View v) {
int count = 0;
String washItem = wash_v.get(position);
int washItems = Integer.parseInt(washItem);
if (washItems != 0) {
int colorStart = Color.LTGRAY;
int colorEnd = 0;
ValueAnimator animator = ObjectAnimator.ofInt(v,
"backgroundColor", colorStart, colorEnd);
animator.setDuration(800);
animator.setEvaluator(new ArgbEvaluator());
animator.setRepeatCount(0);
animator.start();
washItemCount = Float.parseFloat(washItem);
tvVal.setVisibility(View.VISIBLE);
count = Integer.parseInt(tvVal.getText().toString());
countVal1 = ++count;
i.putExtra("washItemCount", washItemCount);
i.putExtra("countVal1", countVal1);
context.sendBroadcast(i);
try {
int temp = launDry.get(Integer.parseInt(ll1.getTag()
.toString().trim()));
temp++;
launDry.put(Integer.parseInt(ll1.getTag().toString()
.trim()), temp);
long id = dbHandler.insertBabyWearValues(Integer
.parseInt(ll1.getTag().toString().trim()),
countVal1, countVal2, countVal3);
if (id == -1) {
long updateid = dbHandler.updateBabyWear(countVal1,
countVal2, countVal3);
Toast.makeText(context, "ID value" + updateid,
Toast.LENGTH_SHORT).show();
}
Toast.makeText(context, "ID value" + id,
Toast.LENGTH_SHORT).show();
Appconstants.laundryHashmap = launDry;
int val = temp + 1;
tvVal.setText("" + val);
} catch (Exception e) {
launDry.put(Integer.parseInt(ll1.getTag().toString()
.trim()), 0);
tvVal.setText("" + 1);
e.printStackTrace();
}
}
}
});
ll2.setOnClickListener(new OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(final View v) {
int count = 0;
String washItem = iron_v.get(position);
washItemCount = Float.parseFloat(washItem);
int washItems = Integer.parseInt(washItem);
if (washItems != 0) {
int colorStart = Color.LTGRAY;
int colorEnd = 0;
ValueAnimator animator = ObjectAnimator.ofInt(v,
"backgroundColor", colorStart, colorEnd);
animator.setDuration(800);
animator.setEvaluator(new ArgbEvaluator());
animator.setRepeatCount(0);
animator.start();
washItemCount = Float.parseFloat(washItem);
tvVal1.setVisibility(View.VISIBLE);
count = Integer.parseInt(tvVal1.getText().toString());
countVal2 = ++count;
// tvVal1.setText("" + countVal2);
i.putExtra("washItemCount", washItemCount);
i.putExtra("countVal2", countVal2);
context.sendBroadcast(i);
try {
int temp = stremIron.get(Integer.parseInt(ll2.getTag()
.toString().trim()));
temp++;
stremIron.put(Integer.parseInt(ll2.getTag().toString()
.trim()), temp);
long id = dbHandler.insertBabyWearValues(Integer
.parseInt(ll2.getTag().toString().trim()),
countVal1, countVal2, countVal3);
Toast.makeText(context, "ID value" + id,
Toast.LENGTH_SHORT).show();
if (id == -1) {
long updateid = dbHandler.updateBabyWear(countVal1,
countVal2, countVal3);
Toast.makeText(context, "ID value" + updateid,
Toast.LENGTH_SHORT).show();
}
Appconstants.ironHashmap = stremIron;
int val = temp + 1;
tvVal1.setText("" + val);
} catch (Exception e) {
stremIron.put(Integer.parseInt(ll2.getTag().toString()
.trim()), 0);
tvVal1.setText("" + 1);
e.printStackTrace();
}
}
}
});
ll3.setOnClickListener(new OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(final View v) {
int count = 0;
String washItem = dry_v.get(position);
washItemCount = Float.parseFloat(washItem);
int washItems = Integer.parseInt(washItem);
if (washItems != 0) {
int colorStart = Color.LTGRAY;
int colorEnd = 0;
ValueAnimator animator = ObjectAnimator.ofInt(v,
"backgroundColor", colorStart, colorEnd);
animator.setDuration(800);
animator.setEvaluator(new ArgbEvaluator());
animator.setRepeatCount(0);
animator.start();
washItemCount = Float.parseFloat(washItem);
tvVal2.setVisibility(View.VISIBLE);
count = Integer.parseInt(tvVal2.getText().toString());
countVal3 = ++count;
// tvVal2.setText("" + countVal3);
i.putExtra("washItemCount", washItemCount);
i.putExtra("countVal3", countVal3);
context.sendBroadcast(i);
try {
int temp = dryCleans.get(Integer.parseInt(ll3.getTag()
.toString().trim()));
temp++;
dryCleans.put(Integer.parseInt(ll3.getTag().toString()
.trim()), temp);
long id = dbHandler.insertBabyWearValues(Integer
.parseInt(ll3.getTag().toString().trim()),
countVal1, countVal2, countVal3);
Toast.makeText(context, "ID value" + id,
Toast.LENGTH_SHORT).show();
if (id == -1) {
long updateid = dbHandler.updateBabyWear(countVal1,
countVal2, countVal3);
Toast.makeText(context, "ID value" + updateid,
Toast.LENGTH_SHORT).show();
}
Appconstants.dryCleanHashmap = dryCleans;
int val = temp + 1;
tvVal2.setText("" + val);
} catch (Exception e) {
dryCleans.put(Integer.parseInt(ll3.getTag().toString()
.trim()), 0);
tvVal2.setText("" + 1);
e.printStackTrace();
}
}
}
});
return convertView;
}
}
這里的重點是我寫了這個邏輯適配器，即 getView()。
3 個解決方案
解決方案1
0 2015-09-10 06:56:02
這可能是因為您的值可能是十進制的，並且在將其解析為整數期間，如果數字小於 1，則它會轉換為 0，即 0.88 等
更改您的代碼
String countVal1 = c.getString(c.getColumnIndex("laundry_item"));
String countVal2 = c.getString(c.getColumnIndex("dry_item"));
String countVal3 = c.getString(c.getColumnIndex("iron_item"));
int count2 =Integer.parseInt(countVal2);
int count3 =Integer.parseInt(countVal3);
int count1 =Integer.parseInt(countVal1);
tvVal.setText("" + count1);
tvVal.setVisibility(View.VISIBLE);
更改代碼
String countVal1 = c.getString(c.getColumnIndex("laundry_item"));
String countVal2 = c.getString(c.getColumnIndex("dry_item"));
String countVal3 = c.getString(c.getColumnIndex("iron_item"));
tvVal.setText(countVal1);
tvVal.setVisibility(View.VISIBLE);
您可以直接將您的值顯示到 textview 中，而無需將它們轉換為整數然后用字符串加法顯示。
請檢查並讓我知道它是否有幫助。
編輯：
檢查您的代碼后，我發現以下幾行可能會在您的代碼中產生問題，進而在文本視圖中將您的值轉換為零
try {
int temp = launDry.get(Integer.parseInt(ll1.getTag().toString()
.trim()));
int val = temp + 1;
tvVal.setText("" + val);
tvVal.setVisibility(View.VISIBLE);
} catch (Exception e) {
tvVal.setText("0"); // Here you are setting it to zero
}
try {
int temp = stremIron.get(Integer.parseInt(ll2.getTag().toString()
.trim()));
int val = temp + 1;
tvVal1.setText("" + val);
tvVal1.setVisibility(View.VISIBLE);
} catch (Exception e) {
tvVal1.setText("0"); // Here you are setting it to zero
}
這些 try 塊是一些如何拋出異常，進而導致文本視圖的 catch 塊值變為零。 請檢查您的 try 塊代碼，為什么它們會拋出異常。
編輯 2：如果您的HashMap “ launDry ”或“ stremIron ”不包含您通過Integer.parseInt(ll2.getTag().toString().trim())傳遞的鍵，那么它將返回 null 並且整數不能包含空值。 我相信在這種情況下會拋出異常。 請再次檢查。
編輯 3：按要求解決方案
try {
String temp = stremIron.get(Integer.parseInt(ll2.getTag().toString()
.trim()));
if(temp != null){
int val = Integer.parseInt(temp) + 1;
tvVal1.setText("" + val);
tvVal1.setVisibility(View.VISIBLE);
}
} catch (Exception e) {
tvVal1.setText("0"); // Here you are setting it to zero
}
解決方案2
0 2015-09-10 07:03:41
也許您正在從非 ui 線程設置文本字段的值。 如果您不在 UI 線程中設置 textField 的值，它將不會更改。 更改行：
int count1 =Integer.parseInt(countVal1);
tvVal.setText("" + count1);
到
final int count1 =Integer.parseInt(countVal1);
runOnUiThread(new new Runnable() {
public void run() {
tvVal.setText("" + count1);
}
});
或者，如果您無法訪問 runOnUiThread，則使用此 postToUI 方法：
import android.os.Handler;
import android.os.Looper;
public class UITools {
public static void postToUI(Runnable r) {
Handler handler = new Handler(Looper.getMainLooper());
handler.post(r);
}
}
解決方案3
0 2015-09-10 07:15:05
像這樣嘗試您的查詢，看看輸出是什么：
Cursor c = db.rawQuery("select * from babywear_tbl where pid ='" + pid+"'",
null);
這是一個像這樣的單引號pid='"+pid+"'",null);不要放任何空格
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