Android学习之——APP番茄工作法——小结（2）

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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

@Overridepublic 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：

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