传智java安卓教学第6天课件

1 按钮处显示日期修改时间修改2 <?xmlversion="1.0"encoding="utf- ><TextViewandroid:text=""android:id="@+id/TextView01"<TextViewandroid:text=""android:id="@+id/TextView02"publicclassMainActivityextendsActivityprivateButtonb1,b2;privateTextViewtv1,tv2;privateCalendarc;privateintprivateintpublicvoidonCreate(BundlesavedInstanceState){b1=(Button)findViewById(R.id.Button01);b2=c=m_year=c.get(Calendar.YEAR);m_month=c.get(Calendar.MONTH);m_day=c.get(Calendar.DAY_OF_MONTH);m_hour=c.get(Calendar.HOUR);m_minute=c.get(Calendar.MINUTE);tv1=tv2=(TextView)findViewById(R.id.TextView02);b1.setOnClickListener(newOnClickListener()publicvoidonClick(Viewv){}b2.setOnClickListener(newOnClickListener()publicvoidonClick(Viewv){}}protectedDialogonCreateDialog(intid)returnnewDatePickerDialog(this,m_year,m_month,returnnewl2,m_hour,m_minute,}}privateOnDateSetListenerl1=newOnDateSetListener()publicvoidonDateSet(DatePickerview,intyear,intdayOfMonth){m_year=year;m_month=monthOfYear;m_day=dayOfMonth;}privateOnTimeSetListenerl2=newOnTimeSetListener()publicvoidonTimeSet(TimePickerview,inthourOfDay,minute)m_hour=hourOfDay;m_minute=minute;}}1 2 3 importimportimport <<?xmlversion="1.0"encoding="utf- >importimportimport publicclassMainAcitivityextendsActivity{private pleteTextViewatv;publicvoidonCreate(BundlesavedInstanceState){atv=( String[]strs={"abc11","abcd44","abcdefg...","bcd55","bcde66","bcd778899"};ArrayAdapteradapter=newArrayAdapter(this,android.R.layout.simple_dropdown_item_1line,strs);}}1 <?xmlversion="1.0"<?xmlversion="1.0"encoding="utf- > importimportimportimportandroid.app.TabActivity;importandroid.os.Bundle;importandroid.view.View;importandroid.widget.ArrayAdapter;importandroid.widget.ListView;importandroid.widget.TabHost;**publicclassMainActivityextendsTabActivityTabHost.TabContentFactory/**Calledwhentheactivityisfirstcreated.*/publicvoidonCreate(BundlesavedInstanceState)TabHostth=getTabHost();}publicViewcreateTabContent(Stringtag){ListViewlv=newListView(this);List<String>list=newArrayList<String>();}elseif(tag.equals("ok")){ }}ArrayAdapteradapter=newArrayAdapter(this,android.R.layout.simple_list_item_checked,list);return}}四、浏览设计1 浏览中各2 <?xmlversion="1.0"encoding="utf- <ImageSwitcherandroid:id="@+id/switcher"<Galleryandroid:id="@+id/gallery" importandroid.app.Activity;importandroid.content.Context;importandroid.os.Bundle;importandroid.view.View;importandroid.view.ViewGroup;importandroid.view.Window;importimportandroid.widget.AdapterView;importandroid.widget.BaseAdapter;importandroid.widget.Gallery;importandroid.widget.ImageSwitcher;importandroid.widget.ImageView;importimportimportpublicclassMainActivityextendsActivityViewFactoryprivateImageSwitcherprivateInteger[]mThumbIds={R.drawable.sample_thumb_0,R.drawable.sample_thumb_1,R.drawable.sample_thumb_2,R.drawable.sample_thumb_3,R.drawable.sample_thumb_4,R.drawable.sample_thumb_5,R.drawable.sample_thumb_6,R.drawable.sample_thumb_7};privateInteger[]mImageIds={R.drawable.sample_0,R.drawable.sample_2,R.drawable.sample_3,R.drawable.sample_5,R.drawable.sample_6,R.drawable.sample_7};publicvoidonCreate(BundlesavedInstanceState)mSwitcher=(ImageSwitcher)findViewById(R.id.switcher);Galleryg=(Gallery)g.setAdapter(newImageAdapter(this));}publicclassImageAdapterextendsBaseAdapterpublicImageAdapter(Contextc){mContext=c;}publicintgetCount()return}publicObjectgetItem(intposition)return}publiclonggetItemId(intposition)returnreturn}publicViewgetView(intposition,ViewconvertView,ViewGroupparent){ImageViewi=newi.setLayoutParams(newGallery.LayoutParams(return}privateContext}publicvoidonItemSelected(AdapterView<?>adapter,Viewv,longid){}publicvoidonNothingSelected(AdapterView<?>arg0)}publicViewmakeView()ImageViewi=newImageView(this);i.setLayoutParams(newImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,return}}五、的各类变换1 2 3 <?xmlversion="1.0"encoding="utf- android:text="TestScale..."android:text="TestAlpha..."<Buttonandroid:text="TestTranslate..."<Buttonandroid:text="TestRotate..."importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.view.animation.AlphaAnimation;importandroid.view.animation.Animation;importandroid.view.animation.RotateAnimation;importandroid.view.animation.ScaleAnimation;importimportimportpublicclassMainActivityextendsActivity privateButtonb1,b2,b3, privateImageViewgirlImage;publicvoidonCreate(BundlesavedInstanceState)girlImage=(ImageView)b1=(Button)findViewById(R.id.Button01);b2=(Button)findViewById(R.id.Button02);b3=(Button)findViewById(R.id.Button03);b4=(Button)0f,

b1.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)创建Sacle(尺寸)AnimationscaleAnimation=newScaleAnimation(0f,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);}

b2.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)创建Alpha(渐变)AnimationalphaAnimation=new}b3.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)//AnimationtranslateAnimation=TranslateAnimation(10,10,}b4.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)AnimationrotateAnimation=newAnimation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);}}}六、用产生模拟动1 2 <?xmlversion="1.0"encoding="utf- importimportimportimportimportimportimportpublicclassMainActivityextendsActivity privateButtonb1, privateImageView privateAnimationDrawablepublicvoidonCreate(BundlesavedInstanceState)myImage=(ImageView)findViewById(R.id.ImageView01);b1=(Button)findViewById(R.id.Button01);b2=(Button)//danceAnimation=(AnimationDrawable)b1.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)}}b2.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv)}}}七、动1 2 <?xmlversion="1.0"encoding="utf- android:text="TestScale..."android:text="TestAlpha..."<Buttonandroid:text="TestTranslate..."<Buttonandroid:text="TestRotate..."importandroid.app.Activity;importandroid.content.Context;importimportimportandroid.graphics.Canvas;importandroid.graphics.Matrix;importandroid.os.Bundle;importandroid.view.KeyEvent;importandroid.view.View;publicclassMainActivityextendsActivity{publicvoidonCreate(BundlesavedInstanceState)MyViewmyView=new}classMyViewextendsViewprivateBitmapMatrixprivateMatrixmatrix=newprivatefloatangle=privateintw,privatefloatscale=privatebooleanisScale=publicMyView(Contextcontext)bm=BitmapFactory.decodeResource(this.getResources(),w=h=}protectedvoidonDraw(Canvascanvas)//重置Matrixif(!isScale//旋转Matrix}else//缩放Matrixmatrix.setScale(scalescale);}BitmapBitmapbm2=Bitmap.createBitmap(bm,0,0,w,h,canvas.drawBitmap(bm2,matrix,}publicbooleanonKeyDown(intkeyCode,KeyEventevent)if(keyCode==KeyEvent.KEYCODE_DPAD_LEFT){isScale=false;}if(keyCode==KeyEvent.KEYCODE_DPAD_RIGHT){isScale=false;}if(keyCode==KeyEvent.KEYCODE_DPAD_UP){isScale=true;if(scale<2.0)scale+=}if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){isScale=true;if(scale>0.5)scale-=}returnsuper.onKeyDown(keyCode,}}},canvas,1 2 <?xmlversion="1.0"encoding="utf- > importandroid.app.Activity;importandroid.content.Context;importandroid.graphics.Canvas;importandroid.graphics.Color;importimportandroid.graphics.Paint;importandroid.graphics.Path;importandroid.graphics.RectF;importandroid.graphics.Shader;importandroid.os.Bundle;importandroid.view.View;publicclassMainActivityextendsActivity{publicvoidonCreate(BundlesavedInstanceState){setContentView(newMyView(this));}privateclassMyViewextendspublicMyView(Contextcontext)}protectedvoidonDraw(Canvascanvas)Paintpaint=newPaint();canvas.drawCircle(40,40,30,paint);RectFre=newRectF(10,220,70,250);canvas.drawOval(re,paint);Pathpath=newPath(); th(path,Pathpath1=newPath(); th(path1,canvas.drawCircle(120,40,30,paint);RectFre2=newRectF(90,220,150,250);canvas.drawOval(re2,paint);Pathpath2=newPath(); th(path2,paint);Pathpath3=newPath(); th(path3,ShadermShader=newLinearGradient(0,newint[]{Color.GREEN,null,Shader.TileMode.REPEAT);canvas.drawCircle(200,40,30,paint);RectFre3=newRectF(170,220,230,250);canvas.drawOval(re3,paint);Pathpath4=newPath(); th(path4,paint);Pathpath5=newPath(); th(path5,paint);}}}31 2 Collection是ListSet十、面试题－2，List、Set、MapCollection是ListSet 1 sleep与wait均是休息，但2个休息的cpu状态不2 sleep占用cpu的运行时3 wait不占用cpur运行时 1 2 3 4 5 6 7 一个对象序列化后，可以通过java流操