Android学习之——APP番茄工作法——小结（2）

上一篇连接：http://blog.csdn.net/fu222cs98/article/details/21053491

继续上一篇
问题十一：在Fragment实现类中中加载资源文件的方式：
在onCreate方法中：

LayoutInflater inflater = getActivity().getLayoutInflater();
mMainView = inflater.inflate(R.layout.task_layout_main, (ViewGroup)getActivity().findViewById(R.id.viewpager), false);

重写onCreateView方法

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO 自动生成的方法存根
Log.i("MAIN", "^^^^^^^^TaskFragment^^^^^^^^onCreateView^^^^^^^^");
ViewGroup p = (ViewGroup) mMainView.getParent();
if (p != null) {
p.removeAllViewsInLayout();
Log.i("MAIN", "^^^^^^^^TaskFragment^^^^^^^^removeAllViewsInLayout!!!!!!!!");
}
return mMainView;
}

问题十二：SQLiteHelper实现类：

package com.android.tomatotask.Task;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class SqliteHelper extends SQLiteOpenHelper {
private static String INFONAME;
private static String NAME;
private static int VERSION = 1;
static
{
NAME = " table_notepad";
INFONAME = "notepad.db";
}
public SqliteHelper(Context paramContext, String paramString, SQLiteDatabase.CursorFactory paramCursorFactory, int paramInt)
{
super(paramContext, INFONAME, null, VERSION);
}
public void onCreate(SQLiteDatabase paramSQLiteDatabase)
{
paramSQLiteDatabase.execSQL("create table " + NAME + "(id INTEGER PRIMARY KEY AUTOINCREMENT,title TEXT)");
}

public void onUpgrade(SQLiteDatabase paramSQLiteDatabase, int paramInt1, int paramInt2)
{
}
}

问题十三：SQLite改变的类

package com.android.tomatotask.Task;
import java.util.ArrayList;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class ChangeSqlite {
public static String table = "table_notepad";
public long add(SQLiteDatabase paramSQLiteDatabase, Notepad paramNotepad) {
ContentValues localContentValues = new ContentValues();
localContentValues.put("title", paramNotepad.getTitle());
long l = paramSQLiteDatabase.insert(table, null, localContentValues);
paramSQLiteDatabase.close();
return l;
}
public void delete(SQLiteDatabase paramSQLiteDatabase, Notepad paramNotepad) {
paramSQLiteDatabase.delete(table, "id=" + paramNotepad.getid(), null);
paramSQLiteDatabase.close();
}

public ArrayList<Notepad> query(SQLiteDatabase paramSQLiteDatabase) {
ArrayList<Notepad> localArrayList = new ArrayList<Notepad>();
Cursor localCursor = paramSQLiteDatabase.query(table, new String[] {
"id", "title" }, null, null, null, null, null);
while (true) {
if (!localCursor.moveToNext()) {
paramSQLiteDatabase.close();
return localArrayList;
}
Notepad localNotepad = new Notepad();
localNotepad.setid(localCursor.getString(localCursor
.getColumnIndex("id")));
localNotepad.setTitle(localCursor.getString(localCursor
.getColumnIndex("title")));
localArrayList.add(localNotepad);
}
}
public void update(SQLiteDatabase paramSQLiteDatabase, Notepad paramNotepad) {
ContentValues localContentValues = new ContentValues();
localContentValues.put("title", paramNotepad.getTitle());
paramSQLiteDatabase.update(table, localContentValues, "id="
+ paramNotepad.getid(), null);
paramSQLiteDatabase.close();
}
}

问题十二和问题十三的实现：

SQLiteDatabase localSqLiteDatabase = new SqliteHelper(getActivity(), null, null, 0).getWritableDatabase();
Notepad localNotepad = new Notepad();//自己定义的类
ChangeSqlite localChangeSqlite = new ChangeSqlite();
String strContent = editText.getText().toString();
if (strContent.equals("")) {
Toast.makeText(getActivity(), "内容为空", Toast.LENGTH_SHORT).show();
}
String strTitle=strContent.length()>11?" "+strContent.substring(0, 11):strContent;
localNotepad.setContent(strContent);
localNotepad.setTitle(strTitle);
localNotepad.setdata(date);
localChangeSqlite.add(localSqLiteDatabase, localNotepad);

问题十四：重写TextView，使之每行带横线的效果：

package com.android.tomatotask.Task;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
public class DateLine extends TextView {
private Paint ePaint = new Paint();
public DateLine(Context context) {
super(context);
// TODO 自动生成的构造函数存根
}
public DateLine(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO 自动生成的构造函数存根
this.ePaint.setColor(-16777216);
this.ePaint.setStyle(Paint.Style.STROKE);
}
@Override
protected void onDraw(Canvas canvas) {
// TODO 自动生成的方法存根
canvas.drawLine(0.0F, 40.0F, getWidth(), 40.0F, this.ePaint);
super.onDraw(canvas);
}
}

或者如下代码：

package com.android.tomatotask.Task;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
public class TextViewLine extends TextView {
private Paint ePaint = new Paint();
public TextViewLine(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO 自动生成的构造函数存根
this.ePaint.setColor(-16777216);
this.ePaint.setStyle(Paint.Style.STROKE);
}
@Override
protected void onDraw(Canvas canvas) {
// TODO 自动生成的方法存根
super.onDraw(canvas);
int i=getLineCount();
for (int j = 0; ; ++j)
{
if (j >= i)
{
super.onDraw(canvas);
return;
}
float[] arrayOfFloat = new float[4];
arrayOfFloat[0] = 15.0F;
arrayOfFloat[1] = ((j + 1) * getLineHeight());
arrayOfFloat[2] = (-20 + getWidth());
arrayOfFloat[3] = ((j + 1) * getLineHeight());
canvas.drawLines(arrayOfFloat, this.ePaint);
}
}
}

问题十五：重写EditText，使之每行带横线的效果：

package com.android.tomatotask.Task;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.EditText;
public class DrawLine extends EditText {
private Paint ePaint;
// private Rect rect;
public DrawLine(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
ePaint = new Paint();
// rect=new Rect();
ePaint.setColor(Color.BLACK);
ePaint.setStyle(Paint.Style.STROKE);
}
// 标记3，此处线字交叉是由于行间距引起,注意使用getLineHeight()得到行高。
public void onDraw(Canvas canvas) {
int count = getLineCount();
for (int i = 0; i < count + 11; i++) {
float[] pts = { 15.0F, (i + 1) * getLineHeight(),
this.getWidth() - 20.0F, (i + 1) * getLineHeight() };
// i*50-280,50增加则行间距大285增加则线靠上。
// canvas.drawLine(15, i*42, this.getWidth()-20,i*42, ePaint);
canvas.drawLines(pts, ePaint);
}
super.onDraw(canvas);
}
}

问题十四和问题十五的XML：

<com.android.tomatotask.Task.DateLine
android:textColor="#ffff0000"
android:gravity="center" android:id="@id/editdate" android:background="@drawable/shapetop"
android:layout_width="300.0dip" android:layout_height="30.0dip"
android:layout_centerHorizontal="true" />
<com.android.tomatotask.Task.DrawLine android:textSize="18.0sp"
android:textColor="#ff000000" android:gravity="top" android:id="@id/edittexttwo"
android:background="@drawable/shape" android:scrollbars="vertical"
android:layout_width="300.0dip" android:layout_height="100.0dip"
android:layout_below="@id/editdate" android:layout_centerHorizontal="true"
android:lineSpacingExtra="3.0dip" />

<com.android.tomatotask.Task.DateLine
android:textColor="#ffff0000" android:gravity="center" android:id="@id/changedateview"
android:background="@drawable/shapetop" android:layout_width="300.0dip"
android:layout_height="27.0dip" android:layout_marginTop="8.0dip"
android:layout_centerHorizontal="true" />
<com.android.tomatotask.Task.TextViewLine
android:textSize="15.0sp" android:textColor="#ff000000" android:id="@id/changecontentview"
android:background="@drawable/shape" android:layout_width="300.0dip"
android:layout_height="wrap_content" android:minHeight="68.0dip"
android:layout_below="@id/changedateview"
android:layout_centerHorizontal="true" android:lineSpacingExtra="6.0dip" />

问题十六：取消标题行显示：
在styles.xml文件中

<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
<item name="android:windowNoTitle">true</item>
</style>

注：为了阅读体验以及排版效果，本文代码与实际番茄工作法项目中代码有出入。仅作参考

应用截图：