我是Android开发的新手，并且正在使用绘图应用。该应用程序一直工作到昨天，当我开始更改activity_main.xml
中的界面时如果有人能帮我找出问题所在，或者告诉我将来如何找到这些问题，我们将不胜感激！
CatLog：
0-25 02:51:33.967: E/AndroidRuntime(853): FATAL EXCEPTION: Thread-84
10-25 02:51:33.967: E/AndroidRuntime(853): android.database.sqlite.SQLiteException: unknown error (code 14): Could not open database
10-25 02:51:33.967: E/AndroidRuntime(853): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:181)
10-25 02:51:33.967: E/AndroidRuntime(853): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
10-25 02:51:33.967: E/AndroidRuntime(853): at android.content.ContentProviderProxy.query(ContentProviderNative.java:385)
10-25 02:51:33.967: E/AndroidRuntime(853): at android.content.ContentResolver.query(ContentResolver.java:414)
10-25 02:51:33.967: E/AndroidRuntime(853): at android.content.ContentResolver.query(ContentResolver.java:357)
10-25 02:51:33.967: E/AndroidRuntime(853): at com.android.inputmethod.latin.UserBinaryDictionary.loadDictionaryAsync(UserBinaryDictionary.java:189)
10-25 02:51:33.967: E/AndroidRuntime(853): at com.android.inputmethod.latin.ExpandableBinaryDictionary.generateBinaryDictionary(ExpandableBinaryDictionary.java:313)
10-25 02:51:33.967: E/AndroidRuntime(853): at com.android.inputmethod.latin.ExpandableBinaryDictionary.syncReloadDictionaryInternal(ExpandableBinaryDictionary.java:403)
10-25 02:51:33.967: E/AndroidRuntime(853): at com.android.inputmethod.latin.ExpandableBinaryDictionary.access$500(ExpandableBinaryDictionary.java:47)
10-25 02:51:33.967: E/AndroidRuntime(853): at com.android.inputmethod.latin.ExpandableBinaryDictionary$AsyncReloadDictionaryTask.run(ExpandableBinaryDictionary.java:435)
MainActivity.java：
package com.example.strip;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import java.util.UUID;
import android.provider.MediaStore;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.view.View.OnClickListener;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
//custom drawing view
private DrawingView drawView;
//paint color
private ImageButton currPaint, drawBtn, eraseBtn, newBtn, saveBtn;
//brush size
private float smallBrush, mediumBrush, largeBrush;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//get drawing view
drawView = (DrawingView)findViewById(R.id.drawing);
//get palette and first color button
LinearLayout paintLayout = (LinearLayout)findViewById(R.id.paint_colors);
currPaint = (ImageButton)paintLayout.getChildAt(0);
currPaint.setImageDrawable(getResources().getDrawable(R.drawable.paint_pressed));
//get brush sizes
smallBrush = getResources().getInteger(R.integer.small_size);
mediumBrush = getResources().getInteger(R.integer.medium_size);
largeBrush = getResources().getInteger(R.integer.large_size);
//draw button
drawBtn = (ImageButton)findViewById(R.id.draw_btn);
drawBtn.setOnClickListener(this);
//set initial brush size
drawView.setBrushSize(mediumBrush);
//set erase button, listen for click
eraseBtn = (ImageButton)findViewById(R.id.erase_btn);
eraseBtn.setOnClickListener(this);
//set NEW button, listen for click
newBtn = (ImageButton)findViewById(R.id.new_btn);
newBtn.setOnClickListener(this);
//set SAVEIMAGE button and listen for click
saveBtn = (ImageButton)findViewById(R.id.save_btn);
saveBtn.setOnClickListener(this);
}//end of onCreate
@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;
}
//user clicked paint
public void paintClicked(View view){
//use chosen color, set erase to false, and use last brush size
if(view!=currPaint){
drawView.setErase(false);
drawView.setBrushSize(drawView.getLastBrushSize());
ImageButton imgView = (ImageButton)view;
String color = view.getTag().toString();
drawView.setColor(color);
//update ui
imgView.setImageDrawable(getResources().getDrawable(R.drawable.paint_pressed));
currPaint.setImageDrawable(getResources().getDrawable(R.drawable.paint));
currPaint=(ImageButton)view;
}
}
@Override
public void onClick(View view)
{
if(view.getId()==R.id.draw_btn){
//draw button clicked
final Dialog brushDialog = new Dialog(this);
brushDialog.setTitle("Brush Size:");
brushDialog.setContentView(R.layout.brush_chooser);
//listen for clicks on size buttons
ImageButton smallBtn = (ImageButton)brushDialog.findViewById(R.id.small_brush);
smallBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(false);
drawView.setBrushSize(smallBrush);
drawView.setLastBrushSize(smallBrush);
brushDialog.dismiss();
}
});
ImageButton mediumBtn = (ImageButton)brushDialog.findViewById(R.id.medium_brush);
mediumBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(false);
drawView.setBrushSize(mediumBrush);
drawView.setLastBrushSize(mediumBrush);
brushDialog.dismiss();
}
});
ImageButton largeBtn = (ImageButton)brushDialog.findViewById(R.id.large_brush);
largeBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(false);
drawView.setBrushSize(largeBrush);
drawView.setLastBrushSize(largeBrush);
brushDialog.dismiss();
}
});
brushDialog.show();
}
else if(view.getId()==R.id.erase_btn){
//switch to erase, choose size
final Dialog brushDialog = new Dialog(this);
brushDialog.setTitle("Eraser Size:");
brushDialog.setContentView(R.layout.brush_chooser);
//listen for clicks on size buttons
ImageButton smallBtn = (ImageButton)brushDialog.findViewById(R.id.small_brush);
smallBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(true);
drawView.setBrushSize(smallBrush);
brushDialog.dismiss();
}
});
ImageButton mediumBtn = (ImageButton)brushDialog.findViewById(R.id.medium_brush);
mediumBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(true);
drawView.setBrushSize(mediumBrush);
brushDialog.dismiss();
}
});
ImageButton largeBtn = (ImageButton)brushDialog.findViewById(R.id.large_brush);
largeBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
drawView.setErase(true);
drawView.setBrushSize(largeBrush);
brushDialog.dismiss();
}
});
brushDialog.show();
}
else if(view.getId()==R.id.new_btn){
//NEW button
//verify user wants new drawing
AlertDialog.Builder newDialog = new AlertDialog.Builder(this);
newDialog.setTitle("New drawing");
newDialog.setMessage("Start new drawing? (You will lose your current drawing)");
newDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
drawView.startNew();
dialog.dismiss();
}
});
newDialog.setNegativeButton("Canvel", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
newDialog.show();
}
else if(view.getId()==R.id.save_btn){
//save drawing
AlertDialog.Builder saveDialog = new AlertDialog.Builder(this);
saveDialog.setTitle("Save drawing");
saveDialog.setMessage("Save drawing to device Gallery?");
saveDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
//save drawing
drawView.setDrawingCacheEnabled(true);
String imgSaved = MediaStore.Images.Media.insertImage(
getContentResolver(), drawView.getDrawingCache(),
UUID.randomUUID().toString()+".png", "drawing");
if(imgSaved!=null){
Toast savedToast = Toast.makeText(getApplicationContext(),
"Drawing saved to Gallery!", Toast.LENGTH_SHORT);
savedToast.show();
}
else{
Toast unsavedToast = Toast.makeText(getApplicationContext(),
"Oops! Image could not be saved.", Toast.LENGTH_SHORT);
unsavedToast.show();
}
drawView.destroyDrawingCache();
}
});
saveDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int which){
dialog.cancel();
}
});
saveDialog.show();
}
}
}
DrawingView.java：
package com.example.strip;
import android.view.View;
import android.content.Context;
import android.util.AttributeSet;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.view.MotionEvent;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.util.TypedValue;
import android.util.Log;
public class DrawingView extends View
{
//drawing path
private Path drawPath;
//drawing and canvas paint
private Paint drawPaint, canvasPaint;
//initial color
private int paintColor = 0xFF660000;
//canvas
private Canvas drawCanvas;
//canvas bitmap
private Bitmap canvasBitmap;
//erase flag
private boolean erase=false;
public void startNew(){
drawCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
invalidate();
}
public void setErase(boolean isErase){
//set erase true or false
erase=isErase;
if(erase) drawPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
else drawPaint.setXfermode(null);
}
public DrawingView(Context context, AttributeSet attrs)
{
super(context, attrs);
setupDrawing();
}
private void setupDrawing(){
//get drawing area setup for interaction
drawPath = new Path();
drawPaint = new Paint();
drawPaint.setColor(paintColor);
drawPaint.setAntiAlias(true);
drawPaint.setStrokeWidth(brushSize);
drawPaint.setStyle(Paint.Style.STROKE);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
canvasPaint = new Paint(Paint.DITHER_FLAG);
brushSize = getResources().getInteger(R.integer.medium_size);
lastBrushSize = brushSize;
}
public void setBrushSize(float newSize){
//update size
float pixelAmount = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
newSize, getResources().getDisplayMetrics());
brushSize=pixelAmount;
drawPaint.setStrokeWidth(brushSize);
}
public void setLastBrushSize(float lastSize){
lastBrushSize=lastSize;
}
public float getLastBrushSize(){
return lastBrushSize;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh){
//view given size
super.onSizeChanged(w, h, oldw, oldh);
canvasBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
drawCanvas = new Canvas(canvasBitmap);
}
@Override
protected void onDraw(Canvas canvas){
//draw view
canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
canvas.drawPath(drawPath, drawPaint);
}
@Override
public boolean onTouchEvent(MotionEvent event){
//detect user touch
float touchX = event.getX();
float touchY = event.getY();
//respond to down, move and up events
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
drawPath.moveTo(touchX, touchY);
break;
case MotionEvent.ACTION_MOVE:
drawPath.lineTo(touchX, touchY);
break;
case MotionEvent.ACTION_UP:
drawPath.lineTo(touchX, touchY);
drawCanvas.drawPath(drawPath, drawPaint);
drawPath.reset();
break;
default:
return false;
}
//redraw
invalidate();
return true;
}
public void setColor(String newColor){
//set color
invalidate();
paintColor = Color.parseColor(newColor);
drawPaint.setColor(paintColor);
}
private float brushSize, lastBrushSize;
int squareDim = 1000000000;
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int h = this.getMeasuredHeight();
int w = this.getMeasuredWidth();
int curSquareDim = Math.min(w,h);
if(curSquareDim < squareDim)
{
squareDim = curSquareDim;
}
Log.d("MyApp", "h "+h+"w "+w+"squareDim "+squareDim);
setMeasuredDimension(squareDim, squareDim);
}
}
activity_main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".DemoActivity">
<com.sothree.slidinguppanel.SlidingUpPanelLayout
android:id="@+id/sliding_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<!-- Top Buttons -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_gravity="center"
android:orientation="horizontal" >
<TableLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:shrinkColumns="*" android:stretchColumns="*" android:background="#ffffff">
<TableRow
android:layout_height="50dp"
android:layout_width="fill_parent"
android:gravity="center_horizontal">
<TextView
android:layout_height="50dp"
android:text="Last Panel"
android:layout_weight="1" android:background="#FFD3D3D3"
android:textColor="#FFF"
android:padding="10dp" android:gravity="center"/>
<TextView
android:layout_height="50dp"
android:text="Current Panel"
android:layout_weight="1" android:background="#FFAA213A"
android:textColor="#FFF"
android:padding="10dp" android:gravity="center"/>
</TableRow>
</TableLayout>
</LinearLayout>
<!-- Custom View -->
<com.example.strip.DrawingView
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:background="#FFFFFFFF"
android:scaleType="centerInside" />
</LinearLayout>
<!-- Color Palette -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="45dp"
android:layout_height="45dp"
android:layout_marginTop="18dp"
android:layout_marginLeft="10dp"
android:gravity="center_vertical"
android:background = "@drawable/palettebutton"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/palettebutton"
android:tag="#FFE21A1A" />
<TableLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_marginTop="3dp"
android:layout_marginRight="4dp"
android:layout_marginLeft="6dp">
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background = "@drawable/colorbutton1"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton1"
android:tag="#FFE21A1A" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton2"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton2"
android:tag="#FFF2D820" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton3"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton3"
android:tag="#FF35EF22" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton4"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton4"
android:tag="#FF26D3EA" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton5"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton5"
android:tag="#FFF73E9B" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton6"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton6"
android:tag="#FFFFFFFF" />
</TableRow>
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="6dp">
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton7"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton7"
android:tag="#FF7A4426"/>
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton8"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton8"
android:tag="#FFF74F1C"/>
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton9"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton9"
android:tag="#FF217C14" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton10"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton10"
android:tag="#FF312EBC"/>
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton11"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton11"
android:tag="#FF5D1F93" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="4dp"
android:background="@drawable/colorbutton12"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/colorbutton12"
android:tag="#FF000000"/>
</TableRow>
</TableLayout>
<ImageButton
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:gravity="center_horizontal"
android:background = "@drawable/sendbutton"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/sendbutton"
android:tag="#FFE21A1A" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_gravity="center"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/new_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/start_new"
android:src="@drawable/new_pic" />
<ImageButton
android:id="@+id/draw_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/brush"
android:src="@drawable/brush" />
<ImageButton
android:id="@+id/erase_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/erase"
android:src="@drawable/eraser" />
<ImageButton
android:id="@+id/save_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/save"
android:src="@drawable/save" />
</LinearLayout>
</LinearLayout>
</com.sothree.slidinguppanel.SlidingUpPanelLayout>
</RelativeLayout>
如果我能提供其他任何信息，请告诉我。 谢谢你的帮助！
答案 0 :(得分：0)
10-25 02：51：33.967：E / AndroidRuntime（853）：android.database.sqlite.SQLiteException：未知错误（代码14）：无法打开数据库
这表示程序无法访问数据库的错误。检查DB连接并尝试调试。那里存在问题。