单元小测开卷

开卷试题1知识点：第一章请写出该图片中的“请输入密码”布局代码其中：布局宽度320sp,布局高度48sp,布局上边距20sp,左内边距10sp.代码框架：请填写红色下划线中的代码片段（共6处）<EditText android:id=“@+id/login_password” _____________________________//布局宽度_____________________________//布局高度_____________________________//布局居中_____________________________//布局上外边距android:background=“@drawable/login_div_bg”android:ems=“10”android:inputType=“textPersonName”_____________________________//左内边距_____________________________//文本内容 />开卷试题2知识点：第二章请写出该图片中的部分Activity代码其中：当我们输入密码“123456”时，会提示密码正确，否则提示密码错误。代码框架：请填写红色下划线中的代码片段（共10处）LinearLayoutlogin;@OverridepublicvoidonClick(Viewv){ AlertDialog.Builderdialog=newAlertDialog.Builder(DialogActivity.this); dialog.setTitle(__________);dialog.setIcon(R.drawable.icon);dialog.setMessage(__________);dialog.setPositiveButton(____,newloginClick());dialog.setNegativeButton(____,newexitClick());login=(__________)this.getLayoutInflater().inflate(R.layout.login,null);dialog.setView(login);}class________implementsDialogInterface.OnClickListener{@OverridepublicvoidonClick(DialogInterfacedialog,intwhich){EditTextpassEdit=login.________(R.id.passEdit);Stringstr=passEdit.getText().toString();if(__________)Toast.makeText(DialogActivity.this,"密码正确",Toast.LENGTH_SHORT).show();elseToast.makeText(DialogActivity.this,"密码错误",Toast.LENGTH_SHORT).show();dialog.dismiss();}}class________implementsDialogInterface.OnClickListener{@OverridepublicvoidonClick(DialogInterfacedialog,intwhich){DialogActivity.________.finish();}}开卷试题3知识点：第三章请写出该图片中的部分Activity代码其中：当我们点击播放按钮，能够正常播放音乐；当我们点击暂停按钮，能够正常暂停音乐。代码框架：请填写红色下划线中的代码片段（共8处）ImageButtonStart,Stop;MediaPlayermp;classmStartimplements__________{@OverridepublicvoidonClick(Viewv){try{if(__________){/*播放按钮事件*/__________Toast.makeText(Localmp3Activity.this,"播放音乐",Toast.LENGTH_LONG).show();Start.setImageResource(R.drawable.music_pause);}else{/*暂停按钮事件*/mp.pause();__________.makeText(Localmp3Activity.this,"暂停播放音乐",Toast.LENGTH_LONG).show();Start.setImageResource(R.drawable.music_play);}}catch(Exceptione){e.printStackTrace();}}}classmStopimplementsView.OnClickListener{@OverridepublicvoidonClick(Viewv){/*停止按钮事件，停止播放音乐（不是退出app）*/__________try{mp=MediaPlayer._______(Localmp3Activity.this,R.raw.abc);mp.setLooping(________);Toast.makeText(Localmp3Activity.this,"停止播放音乐",Toast.LENGTH_LONG).show();}catch(Exceptione){e.printStackTrace();}________.setImageResource(R.drawable.music_play);}}开卷试题4知识点：第四章请写出该图片中的部分Activity代码其中：当我们点击启动时，会正常启动后台服务程序；当我们点击关闭时，会正常销毁后台服务程序。代码框架：请填写红色下划线中的代码片段（共8处）publicclassMusicServiceextends__________{MediaPlayerplay;@OverridepublicIBinderonBind(Intentintent){returnnull;}@OverridepublicvoidonCreate(){super.__________();//创建调用资源音乐文件对象play=MediaPlayer.________(this,R.raw.abc);//设置循环播放play.__________(true);Toast.makeText(this,"创建后台服务...",Toast.LENGTH_LONG).show();}@OverridepublicintonStartCommand(Intentintent,intflags,intstartId){super.__________(intent,flags,startId);________.start();//开始播放音乐Toast.makeText(this,"启动后台服务程序，播放音乐...",Toast.LENGTH_LONG).show();returnSTART_STICKY;//粘性的,如果service进程被kill掉，保留service的状态为开始状态，}@OverridepublicvoidonDestroy(){play.__________();super.__________();Toast.makeText(this,"销毁后台服务！",Toast.LENGTH_LONG).show();}}开卷试题5知识点：第五章布局不做任何改变，需要考生补全代码（共3处），实现以下功能：点击“插入三条记录”按钮实现插入三条记录。点击“查询数据记录”按钮实现查询所有记录。publicclassDB3ActivityextendsAppCompatActivity{Buttoncreatedb,deletedb,queryBtn,deleteItemBtn,insertBtn;TextViewtxt;MySQLDatabasemyc;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.diarydb);createdb=(Button)findViewById(R.id.createdb);deletedb=(Button)findViewById(R.id.deletedb);queryBtn=(Button)findViewById(R.id.querydb);deleteItemBtn=(Button)findViewById(R.id.deleteItemBtn);insertBtn=(Button)findViewById(R.id.insertdb);txt=(TextView)findViewById(R.id.txt);createdb.setOnClickListener(newmClick());deletedb.setOnClickListener(newmClick());queryBtn.setOnClickListener(newmClick());deleteItemBtn.setOnClickListener(newmClick());insertBtn.setOnClickListener(newmClick());myc=newMySQLDatabase();}classmClickimplementsView.OnClickListener{@OverridepublicvoidonClick(Viewview){if(view==createdb){myc.CreateDB(DB3Activity.this);txt.setText("创建数据库成功");}elseif(view==deletedb){myc.deleteDB();txt.setText("删除数据库成功");}elseif(view==queryBtn){（5-3）}elseif(view==deleteItemBtn){myc.deleteItem();txt.setText("删除数据记录成功");}elseif(view==insertBtn){myc.insertItem();txt.setText("添加数据记录成功");}}}}publicclassMySQLDatabase{privatestaticfinalStringDatabase_name="eBook.db";//数据库名privatestaticfinalStringTABLE_NAME="diary";//数据表名privatestaticfinalStringID="nid";//ID编号privatestaticfinalStringTITLE="title";//标题privatestaticfinalStringBODY="body";//正文privatestaticfinalintDatabase_Version=1;privateSQLiteDatabasedb;privateContextcontext;privateDatabaseHelpermyOpenHelper;/**创建数据库*/publicvoidCreateDB(Contextc){context=c;myOpenHelper=newDatabaseHelper(context);try{intmode=Context.MODE_PRIVATE;//创建数据库db=context.openOrCreateDatabase(Database_name,mode,null);//SQL语句StringDATABASE_CREATE="CREATETABLEIFNOTEXISTS"+TABLE_NAME+"("+ID+"INTEGERprimarykeyautoincrement,"+TITLE+"textnotnull,"+BODY+"textnotnull);";db.execSQL(DATABASE_CREATE);//创建数据表Log.i("SQLite","创建数据库成功");}catch(SQLExceptione){Log.i("SQLite","创建数据库失败");}}/**删除数据库*/publicvoiddeleteDB(){try{context.deleteDatabase(Database_name);Log.i("SQLite","删除数据库成功");}catch(SQLExceptione){Log.i("SQLite","删除数据库失败");}}/**每次插入3条数据*/publicvoidinsertItem(){try{ContentValuesvalues=newContentValues();values.put("TITLE","Android");values.put("BODY","发展真是迅速啊");db.insert(TABLE_NAME,ID,values);values.put("TITLE","城市");values.put("BODY","发展真是迅速啊");db.insert(TABLE_NAME,ID,values);（5-1）Log.i("SQLite","插入三条数据成功");}catch(SQLExceptione){Log.i("SQLite","插入三条数据失败");}}/**删除符合条件的数据*/publicvoiddeleteItem(){try{db.delete(TABLE_NAME,"TITLE='城市'",null);Log.i("SQLite","删除数据成功");}catch(SQLExceptione){Log.i("SQLite","删除数据失败");}}/**查询数据表*/publicList<String>showItems(){try{String[]col={TITLE,BODY};Cursorcursor=db.query(TABLE_NAME,col,null,null,null,null,null);Integernum=cursor.getCount();Stringstr="";（5-2）returnresult;}catch(SQLExceptione){Log.i("SQLite","查询数据失败");}returnnull;}privateclassDatabaseHelperextendsSQLiteOpenHelper{publicDatabaseHelper(Contextcontext){super(context,Database_name,null,Database_Version);}@OverridepublicvoidonCreate(SQLiteDatabasesqLiteDatabase){}@OverridepublicvoidonUpgrade(SQLiteDatabasesqLiteDatabase,inti,inti1){}}}

开卷试题6知识点：第六章布局增加“第一张”按钮，需要考生补全代码（共3处），实现以下功能：按钮的声明以及监听；实现跳转到第一张图片功能。publicclassPhotoActivityextendsAppCompatActivityimplementsView.OnClickListener{ImageViewimg;(6-1)int[]imgs={//存放图片索引的int数组R.drawable.pic0,R.drawable.pic1,R.drawable.pic2};intindex=1;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.layout_photo);img=(ImageView)findViewById(R.id.img);(6-2)}@OverridepublicvoidonClick(Viewview){(6-3)}}开卷试题7

知识点：第七章布局增加搜索框，需要考生补全代码（共3处），实现以下功能：搜索框输入城市id为101010100，点击按钮，搜索出结果显示到屏幕。结果呈现格式如上图所示。publicclassWeatherActivityextendsAppCompatActivityimplementsView.OnClickListener{ButtonBtn;TextViewtxt;EditTextid;//Stringurl="/data/cityinfo/101010100.html";//目标网址样式Stringurl="/data/cityinfo/";//北京id：101010100@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_volley);Btn=(Button)findViewById(R.id.btn);（7-1）}@OverridepublicvoidonClick(Viewv){（7-2）JsonObjectRequeststringRequest=newJsonObjectRequest(//第1个参数，目标服务器的URL地址url,//第2个参数,JSONObjectnull,//第3个参数，服务器响应成功的回调newResponse.Listener<JSONObject>(){@OverridepublicvoidonResponse(JSONObjectresponse){try{JSONObjectmjson=response.getJSONObject("weatherinfo");//Jason数据的键值对的键keyStringcity=mjson.getString("city");（7-3）}catch(JSONExceptione){