我有自定义 ListView ，我的数据来自 sqlite 数据库。现在我想根据 id 更改特定 ListView 项目的背景颜色。首先，我检查数据库中是否存在 ID，然后根据 ID 更改特定项目行的背景颜色。
我的问题是它检查成功，但是当我尝试更改背景颜色时，它会更改整个 ListView 背景颜色。这是我的数据的图片和代码。然后你就会明白我的意思了，我到底想对你说什么!
我的数据库:
整个 ListView 颜色更改:
我的代码:
package bible.swordof.God;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.opengl.Visibility;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import com.amulyakhare.textdrawable.TextDrawable;
import com.amulyakhare.textdrawable.util.ColorGenerator;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import es.dmoral.toasty.Toasty;
import petrov.kristiyan.colorpicker.ColorPicker;
import static android.content.Context.MODE_PRIVATE;
import static android.database.sqlite.SQLiteDatabase.CONFLICT_NONE;
import static android.icu.lang.UCharacter.GraphemeClusterBreak.V;
import static android.support.constraint.Constraints.TAG;
import static android.support.v4.content.ContextCompat.createDeviceProtectedStorageContext;
import static android.support.v4.content.ContextCompat.startActivity;
public class FullverseAdopter extends ArrayAdapter<String> {
private ALLVERSE activity;
private List<String> versenumber;
private List<String>verseid;
private List<String> verselist;
private List<String> refernce;
TextToSpeech textToSpeech;
private DatabaseHelper mDBHelper;
private SQLiteDatabase mDb;
private boolean highlight=false;
LinearLayout linearLayout;
public String ex="switch";
//check for availabe language
int result;
public FullverseAdopter(ALLVERSE context, int resource, List<String> versenumber, List<String> verselist, List<String> refernce, List<String>verseid) {
super(context, resource, versenumber);
this.activity = context;
this.versenumber = versenumber;
this.verselist = verselist;
this.refernce = refernce;
this.verseid=verseid;
}
@Override
public int getCount() {
return versenumber.size();
}
@Override
public String getItem(int position) {
return versenumber.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
// If holder not exist then locate all view from UI file.
if (convertView == null) {
// inflate UI from XML file
convertView = inflater.inflate(R.layout.versedisplayrow, parent, false);
// get all UI view
holder = new ViewHolder(convertView);
// set tag for holder
holder.versenumber = (TextView) convertView.findViewById(R.id.versenumber);
holder.verselist = (TextView) convertView.findViewById(R.id.verse);
holder.addfavoruite=(ToggleButton)convertView.findViewById(R.id.adbookmark);
//check if id is exits in db
if(CheckIsDataAlreadyInDBorNot("t_asv","id","1001001"))
{
holder.linearLayout.setBackgroundColor(Color.parseColor("#008577"));
}
convertView.setTag(holder);
} else {
// if holder created, get tag from view
holder = (ViewHolder) convertView.getTag();
}
holder.versenumber.setText(versenumber.get(position));
holder.verselist.setText(verselist.get(position));
holder.linearLayout.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
//Toasty.success(activity, "PICK COLOR", Toast.LENGTH_SHORT, true).show();
Vibrator vibe = (Vibrator)activity.getSystemService(Context.VIBRATOR_SERVICE);
vibe.vibrate(100);
Toast.makeText(activity, ""+verseid.get(position), Toast.LENGTH_SHORT).show();
/* ColorPicker colorPicker = new ColorPicker(activity);
ArrayList<String>colors=new ArrayList<>();
colors.add("#e0e0eb");
colors.add("#ccffff");
colors.add("#ffe6ff");
colors.add("#ffffcc");
colors.add("#ccffcc");
colors.add("#e6f2ff");
colorPicker.setColors(colors).setColumns(4).setTitle("HIGHLIGHT VERSE").setRoundColorButton(true).setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
@Override
public void onChooseColor(int position, int color) {
// holder.linearLayout.setBackgroundColor(color);
}
@Override
public void onCancel() {
}
}).show();*/
return false;
}
});
/*holder.verselist.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
holder.verselist.setBackgroundColor(Color.parseColor("#e0e0eb"));
return false;
}
});*/
//verselist highlight
/*holder.verselist.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});*/
//share verse
holder.share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toasty.info(activity, "Sharing a verse.", Toast.LENGTH_SHORT, true).show();
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, refernce.get(position) + ":" + versenumber.get(position) + '\n' + verselist.get(position));
sendIntent.setType("text/plain");
activity.startActivity(sendIntent);
}
});
//add in favourite
holder.addfavoruite.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
mDBHelper = new DatabaseHelper(activity);
mDb = mDBHelper.getWritableDatabase();
ContentValues contentValues=new ContentValues();
contentValues.put("id",verseid.get(position));
contentValues.put("bookname",refernce.get(position));
contentValues.put("versenumber",versenumber.get(position));
contentValues.put("verse",verselist.get(position));
long check=mDb.insert("favourite",null,contentValues);
Log.d("MY_TAG","DB IS NOW "+check);
Toasty.success(activity, "Added in favouite", Toast.LENGTH_SHORT, true).show();
}else {
mDBHelper = new DatabaseHelper(activity);
mDb = mDBHelper.getWritableDatabase();
long delete= mDb.delete("favourite","id=?",new String[]{verseid.get(position)});
Toasty.error(activity, "Remove in favouite", Toast.LENGTH_SHORT, true).show();
}
}
});
/* textToSpeech = new TextToSpeech(activity, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
result = textToSpeech.setLanguage(Locale.ENGLISH);
} else {
Toast.makeText(activity, "YOUR DEVICE NOT SUPPORTED", Toast.LENGTH_SHORT).show();
}
}
});
*/
//My toggle button
/* holder.speakverse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(activity, "I AM CLICKED", Toast.LENGTH_SHORT).show();
if (result == TextToSpeech.LANG_NOT_SUPPORTED || result == TextToSpeech.LANG_MISSING_DATA) {
Toast.makeText(activity, "Language not supported or Missing", Toast.LENGTH_SHORT).show();
} else {
textToSpeech.speak(verselist.get(position), TextToSpeech.QUEUE_FLUSH, null);
}
}
});*/
return convertView;
}
static class ViewHolder {
private TextView versenumber;
private TextView verselist;
private ImageView share;
private ToggleButton addfavoruite;
private ImageView speakverse;
private LinearLayout linearLayout;
public ViewHolder(View v) {
versenumber = (TextView) v.findViewById(R.id.versenumber);
verselist = (TextView) v.findViewById(R.id.verse);
share = (ImageView) v.findViewById(R.id.share);
/*speakverse = (ImageView) v.findViewById(R.id.speakverse);*/
addfavoruite=(ToggleButton)v.findViewById(R.id.adbookmark);
linearLayout=(LinearLayout)v.findViewById(R.id.layout);
}
}
public boolean CheckIsDataAlreadyInDBorNot(String TableName, String dbfield, String fieldValue) {
mDBHelper = new DatabaseHelper(activity);
mDb = mDBHelper.getReadableDatabase();
String Query = "Select * from " + TableName + " where " + dbfield + " = " + fieldValue;
Cursor cursor = mDb.rawQuery(Query, null);
if(cursor.getCount() <= 0){
cursor.close();
Toast.makeText(activity, "false", Toast.LENGTH_SHORT).show();
return false;
}else {
Toast.makeText(activity, "TRUE", Toast.LENGTH_SHORT).show();
}
cursor.close();
return true;
}
public void opecolorpicker(){
}
}
最佳答案
假设您将 ID 存储在 private List<String>verseid; 中，可以通过它来查看当前ListView的ID项目。
当前项目位置将在 final int position 中传递给您参数。
因此要检查并应用颜色:
删除
if(CheckIsDataAlreadyInDBorNot("t_asv","id","1001001"))
{
holder.linearLayout.setBackgroundColor(Color.parseColor("#008577"));
}
来自 if (convertView == null) {
然后在 if 之外添加此代码:
if("1001001".equals(verseid.get(position))) {
//change the color
} else {
//set the color to default
}
请注意，由于 ListView 的方式作品(回收元素)你必须在else内设置默认颜色.
关于java - 如何更改 Sqlite 数据库中特定数据的 Listview 中的行颜色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56423663/