在我的数独应用程序中，我试图让列表适配器为每个列表项/拼图充气自定义预览视图，但由于某种原因，适配器总是一遍又一遍地膨胀相同的自定义视图。有什么建议吗？
这是我的列表适配器类
package com.example.czhou.myapplication2;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.io.File;
public class SudokuListAdapter extends BaseAdapter {
Context context;
String data[];
private static LayoutInflater inflater = null;
public SudokuListAdapter(Context context, String[] data) {
this.context = context;
this.data = data;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return data.length;
}
@Override
public Object getItem(int position) {
return data[position];
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (vi == null)
vi = inflater.inflate(R.layout.row, null);
TextView text = (TextView) vi.findViewById(R.id.date);
text.setText(data[position]);
System.out.println("pos: " + position);
SudokuPreviewView view = (SudokuPreviewView) vi.findViewById(R.id.preview);
view.setData("puzzle" + data[position]);
return vi;
}
@Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
public void setData(String[] data) {
this.data = data;
}
}
以下是列表活动
package com.example.czhou.myapplication2;
import android.app.Activity;
import android.content.ContentProviderOperation;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import java.io.File;
import java.io.FileOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
/**
* Created by czhou on 1/18/2015.
*/
public class SudokuListActivity extends ActionBarActivity {
public static String[] fileNames;
public SudokuListAdapter mAdapter;
public static File[] files;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context c = this;
setContentView(R.layout.activity_list);
ListView lv = (ListView) findViewById(R.id.listView);
files = c.getFilesDir().listFiles();
fileNames = new String[files.length];
for (int i = 0; i < files.length; i++) {
fileNames[i] = files[i].getName().substring(6,files[i].getName().length());
}
mAdapter = new SudokuListAdapter(this, fileNames);
lv.setAdapter(mAdapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(SudokuListActivity.this,SudokuGameActivity.class);
intent.putExtra("FILE","puzzle" + fileNames[position]);
startActivity(intent);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.activity_list_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Context c = this;
switch (item.getItemId()) {
case R.id.add:
DateFormat dateFormat = new SimpleDateFormat("dd MMMM yy hh:mm:ss a");
Calendar cal = Calendar.getInstance();
String fn = "puzzle" + dateFormat.format(cal.getTime());
SudokuGen sg = new SudokuGen();
CellField cf = sg.generate();
FileOutputStream outputStream;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < 9; i++) {
for (int j = 0; j < 9; j++) {
if (cf.field[i][j].isEditable) {
sb.append(",");
} else {
sb.append(".");
}
if (cf.field[i][j].isWrong) {
sb.append("!");
} else {
sb.append(".");
}
sb.append(cf.field[i][j].getValue());
}
}
try {
outputStream = openFileOutput(fn, Context.MODE_PRIVATE);
outputStream.write(sb.toString().getBytes());
outputStream.close();
System.out.println("Saving... ");
} catch (Exception e) {
e.printStackTrace();
}
Intent intent = new Intent(this, SudokuGameActivity.class);
intent.putExtra("FILE",fn);
startActivity(intent);
break;
default:
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onRestart() {
System.out.println("restarting.. ");
Context c = this;
setContentView(R.layout.activity_list);
ListView lv = (ListView) findViewById(R.id.listView);
files = c.getFilesDir().listFiles();
fileNames = new String[files.length];
for (int i = 0; i < files.length; i++) {
fileNames[i] = files[i].getName().substring(6,files[i].getName().length());
}
mAdapter = new SudokuListAdapter(this, fileNames);
lv.setAdapter(mAdapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(SudokuListActivity.this,SudokuGameActivity.class);
intent.putExtra("FILE","puzzle" + fileNames[position]);
startActivity(intent);
}
});
super.onRestart();
}
}
这是我的预览视图类
package com.example.czhou.myapplication2;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
/**
* Created by czhou on 1/19/2015.
*/
public class SudokuPreviewView extends View{
public float mCellSize = 0;
public boolean mOrientationLandscape;
public float mTextSize;
private Paint mTextColor;
private Paint mTextColorBold;
private Paint mLineColor;
private Paint mRect;
private Paint mRectSecondary;
private Paint mGridLine;
private Paint mSelectedCellColor;
private Paint mErrorCellColor;
private DisplayMetrics displayMetrics;
private float x;
private float y;
private int[] mSelectedCellCordPair;
private ArrayList<Integer> mErrorCellPairs;
public static CellField cf;
private static String mFileName;
public static Cell[][] cells;
private Bundle bundle = new Bundle();
Rect mTextBounds;
private float dpHeight;
private float dpWidth;
public SudokuPreviewView(Context c, AttributeSet attrs) {
super(c, attrs);
setWillNotDraw(false);
TypedArray a = c.getTheme().obtainStyledAttributes(
attrs,
R.styleable.SudokuPreviewView,
0, 0);
mCellSize = a.getDimension(R.styleable.SudokuPreviewView_mCell,30f);
mOrientationLandscape = a.getBoolean(R.styleable.SudokuPreviewView_mOrientationPortrait, false);
mTextSize = a.getDimension(R.styleable.SudokuPreviewView_mTextSize, 5f);
a.recycle();
init();
}
private void init() {
cf = new CellField();
cells = new Cell[9][9];
StringBuilder text = new StringBuilder();
try {
Context c = getContext();
File inputStream = c.getFileStreamPath(mFileName);
BufferedReader br = new BufferedReader(new FileReader(inputStream));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
cells = cf.field;
}
if (text.length() == 243) {
for (int i = 0; i < 9; i++) {
for (int j = 0; j < 9; j++) {
Cell cell = new Cell();
int index = 0;
if (text.substring(index, index + 3).startsWith(",!")) {
cell.setValue(Integer.parseInt(text.substring(index + 2, index + 3)));
cell.isEditable = true;
cell.isWrong = true;
} else if (text.substring(index, index + 3).startsWith(",.")) {
cell.setValue(Integer.parseInt(text.substring(index + 2, index + 3)));
cell.isEditable = true;
} else if (text.substring(index, index + 3).startsWith("..")) {
cell.setValue(Integer.parseInt(text.substring(index + 2, index + 3)));
}
cells[i][j] = cell;
text.delete(index, index + 3);
}
}
}
mTextBounds = new Rect();
displayMetrics = getContext().getResources().getDisplayMetrics();
dpHeight = displayMetrics.heightPixels / displayMetrics.density;
dpWidth = displayMetrics.widthPixels / displayMetrics.density;
mLineColor = new Paint(Paint.ANTI_ALIAS_FLAG);
mLineColor.setColor(getResources().getColor(R.color.material_blue_grey_900));
mLineColor.setStyle(Paint.Style.STROKE);
mLineColor.setStrokeWidth(toDP(1f));
mRect = new Paint(Paint.ANTI_ALIAS_FLAG);
mRect.setColor(getResources().getColor(R.color.background_material_light));
mRectSecondary = new Paint(Paint.ANTI_ALIAS_FLAG);
mRectSecondary.setColor(Color.LTGRAY);
mSelectedCellColor = new Paint(Paint.ANTI_ALIAS_FLAG);
mSelectedCellColor.setColor(Color.YELLOW);
mSelectedCellColor.setAlpha(100);
mSelectedCellColor.setStyle(Paint.Style.FILL);
mGridLine = new Paint(Paint.ANTI_ALIAS_FLAG);
mGridLine.setColor(getResources().getColor(R.color.material_blue_grey_950));
mGridLine.setStyle(Paint.Style.STROKE);
mGridLine.setStrokeWidth(toDP(3f));
Paint.FontMetrics fm = new Paint.FontMetrics();
mTextColor = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextColor.setColor(Color.BLACK);
mTextColor.setStyle(Paint.Style.FILL);
mTextColor.setTextSize(mTextSize);
mTextColor.setTextAlign(Paint.Align.CENTER);
mTextColor.getFontMetrics(fm);
mTextColorBold = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextColorBold.setTypeface(Typeface.DEFAULT_BOLD);
mTextColorBold.setColor(Color.BLACK);
mTextColorBold.setStyle(Paint.Style.FILL);
mTextColorBold.setTextSize(mTextSize);
mTextColorBold.setTextAlign(Paint.Align.CENTER);
mTextColorBold.getFontMetrics(fm);
mErrorCellColor = new Paint(Paint.ANTI_ALIAS_FLAG);
mErrorCellColor.setStyle(Paint.Style.FILL);
mErrorCellColor.setColor(Color.RED);
mErrorCellColor.setAlpha(80);
mErrorCellPairs = new ArrayList<>();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension((int) mCellSize * 9, (int) mCellSize * 9);
}
public void onDraw(Canvas c) {
super.onDraw(c);
for (int i = 0; i < mCellSize * 9; i += mCellSize) {
for (int j = 0; j < mCellSize * 9; j += mCellSize) {
String s = String.valueOf(cells[(int) (i / mCellSize)][(int) (j / mCellSize)].getValue());
// check for wrong cells and highlight them
// if (j >= mCellSize * 3 && j < mCellSize * 6 && i >= 0 && i < mCellSize * 3 ||
// j >= mCellSize * 3 && j < mCellSize * 6 && i >= mCellSize * 6 && i < mCellSize * 9 ||
// i >= mCellSize * 3 && i < mCellSize * 6 && j >= 0 && j < mCellSize * 3 ||
// i >= mCellSize * 3 && i < mCellSize * 6 && j >= mCellSize * 6 && j < mCellSize * 9) {
//
if (!cells[(int) (i / mCellSize)][(int) (j / mCellSize)].isEditable) {
c.drawRect(j, i, j + mCellSize, i + mCellSize, mRectSecondary);
c.drawRect(j, i, j + mCellSize, i + mCellSize, mLineColor);
} else {
// } else {
c.drawRect(j, i, j + mCellSize, i + mCellSize, mLineColor);
}
// }
mTextColor.getTextBounds(s, 0, s.length(), mTextBounds);
float mTextHeight = mTextBounds.height();
float mTextWidth = mTextBounds.width();
if (!s.equals("0")) {
if (!cells[(int) (i / mCellSize)][(int) (j / mCellSize)].isEditable) {
c.drawText(s, j + mCellSize / 2, (i + mTextHeight) + ((mCellSize / 2) - (mTextHeight / 2)), mTextColorBold);
} else {
c.drawText(s, j + mCellSize / 2, (i + mTextHeight) + ((mCellSize / 2) - (mTextHeight / 2)), mTextColor);
}
}
}
}
c.drawRect(0, 0, mCellSize * 9, mCellSize * 9, mGridLine);
c.drawLine(mCellSize * 3, 0, mCellSize * 3, mCellSize * 9, mGridLine);
c.drawLine(mCellSize * 6, 0, mCellSize * 6, mCellSize * 9, mGridLine);
c.drawRect(0, mCellSize * 3, mCellSize * 9, mCellSize * 6, mGridLine);
for (int i = 0; i < 9; i++) {
for (int j = 0; j < 9; j++) {
if (cells[i][j].isWrong) {
Cell wrong = cells[i][j];
if (wrong.getValue() == 0) {
wrong.isWrong = false;
} else {
if (wrong.errorCords.isEmpty()) {
for (int k = 0; k < 9; k++) {
if (cells[k][j].getValue() == wrong.getValue() && k != i) {
wrong.errorCords.add(j);
wrong.errorCords.add(k);
}
}
for (int k = 0; k < 9; k++) {
if (cells[i][k].getValue() == wrong.getValue() && k != j) {
wrong.errorCords.add(k);
wrong.errorCords.add(i);
}
}
cf.field = cells;
wrong.errorCords.addAll(cf.getSectorCords(i, j, wrong.getValue()));
}
for (int k = 0; k < wrong.errorCords.size(); k += 2) {
c.drawRect(wrong.errorCords.get(k) * mCellSize, wrong.errorCords.get(k + 1) * mCellSize, (wrong.errorCords.get(k) * mCellSize) + mCellSize, (wrong.errorCords.get(k + 1) * mCellSize) + mCellSize, mErrorCellColor);
}
}
}
// }
}
}
if (mSelectedCellCordPair != null) {
x = mSelectedCellCordPair[0];
y = mSelectedCellCordPair[1];
if (mSelectedCellCordPair[0] < 9 && mSelectedCellCordPair[1] < 9) {
if (x == 0 || y == 0) {
if (x == 0 && y == 0) {
c.drawRect(x, y, mCellSize, mCellSize, mSelectedCellColor);
} else if (x == 0) {
c.drawRect(x, y * mCellSize, (x + 1) * mCellSize, (y + 1) * mCellSize, mSelectedCellColor);
} else {
c.drawRect(x * mCellSize, y, (x + 1) * mCellSize, (y + 1) * mCellSize, mSelectedCellColor);
}
} else {
c.drawRect(x * mCellSize, y * mCellSize, (x + 1) * mCellSize, (y + 1) * mCellSize, mSelectedCellColor);
}
}
}
}
private float toDP(float dp) {
DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
float fpixels = metrics.density * dp;
int pixels = (int) (fpixels + 0.5f);
return pixels;
}
private float toPixels(float dp) {
Resources r = getResources();
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics());
return px;
}
public void setData (String FileName){
mFileName = FileName;
System.out.println(FileName);
init();
invalidate();
}
}
这是row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp">
<com.example.czhou.myapplication2.SudokuPreviewView
android:layout_width="203dp"
android:layout_height="258dp"
android:id="@+id/preview"
custom:mCell="15dp"
custom:mTextSize="5sp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Last played: 1/1/1"
android:id="@+id/date"
android:layout_gravity="right"
android:layout_alignBottom="@+id/preview"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>
**Here is the activity_list.xml**
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_height="fill_parent"
android:layout_width="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView">
</ListView>
</RelativeLayout>
答案 0 :(得分：0)
视图中的cells字段是静态的。这意味着它适用于整个类，而不是每个实例。每次使用新单元格初始化时，它都会更改每个预览视图的数据。
删除cells，cf和mFileName上的静态内容，它应该开始工作。