實(shí)習(xí)1)phone&AddNoActivity（本步驟相當(dāng)于添加模板Androidstudio2.1使 Androidstudio<?xmlversion="1.0"encoding="utf- android:layout_column="0"/>android:layout_column="1"/>android:layout_column="2"/>android:layout_column="0"/>android:layout_column="1"/>android:layout_column="2"/>android:layout_column="0"/>android:layout_column="1"/>android:layout_column="2"/>2017720最 環(huán)境配置總一 Androidstudio環(huán)境配JavaJava官網(wǎng) JDK JDK框架介紹 參考以 輸入變量名JAVA_HOME輸入變量名CLASSPATH輸入變量名Path4.Android：二 布/guide/topics/text/copy-<?xmlversion="1.0"encoding="utf- android:layout_alignParentEnd="true"android:layout_alignParentStart="true"/> android:layout_marginTop="30dp"/>android:text="郵箱："android:layout_marginTop="30dp"/> android:layout_alignParentStart="true"/>android:layout_alignParentStart="true"/>android:layout_marginTop="30dp"/>android:layout_alignStart="@+id/checkBox"android:layout_alignStart="@+id/checkBox2"android:layout_toStartOf="@+id/textView4"/>android:layout_alignStart="@+id/radioButton"/>android:layout_alignStart="@+id/radioButton"/>android:layout_centerHorizontal="true"2017721創(chuàng) 界面這里要注意一個(gè)工程里只能添加一個(gè)launchactivity，添加判斷語(yǔ)句的添加位置是在onCreat函數(shù)中setConttent后，在Main2Activity里的跳轉(zhuǎn)函數(shù)要注packageimportimportandroid.sup importandroid.os.Bundle;importandroid.view.View;importandroid.widget.Button;importandroid.widget.EditText;importandroid.widget.Toast;publicclassMainActivityextends tivity{Buttonsubmit;protectedvoidonCreate(BundlesavedInstanceState){submit=(Button)findViewById(R.id.button);submit.setOnClickListener(newView.OnClickListener(){publicvoidonClick(Viewv)Stringuser=Stringpwd=Stringrepwd= //判斷兩次輸 是否一Toast.makeText(MainActivity.this"碼不一致，請(qǐng)重新輸入！",ToastLENGTH_LONG).show();((EditText)findViewById(R.id.et_pwd)).setText("");//清空 ”編輯 }Intentintent=newBundlebundlenewBundle();//創(chuàng)建并實(shí)例化BundleE-mail地

}

bundle.putCharSequence("user",user);//保存用 }}}}<?xmlversion="1.0"encoding="utf- android:layout_alignParentEnd="true"android:layout_alignParentStart="true"/> android:layout_alignParentStart="true"/>android:text="郵箱："android:layout_marginTop="61dp"/> android:layout_alignStart="@+id/et_pwd"/>android:layout_toEndOf="@+id/et_c_pwd" android:layout_alignParentStart="true"/>android:layout_toEndOf="@+id/et_user"/>android:layout_toEndOf="@+id/et_c_pwd"/>packageimportimportandroid.sup importandroid.os.Bundle;importpublicclassMain2Activity tivityprotectedvoidonCreate(BundlesavedInstanceState){IntentBundleTextViewuser=(TextView)findViewById(R.id.tv_user);TextViewpwd=(TextView)findViewById(R.id.tv_pwd); }}<?xmlversion="1.0"encoding="utf- android:text="NewText"android:layout_alignParentStart="true"/>android:text="NewText"android:layout_alignParentStart="true"/>android:text="NewText"android:layout_alignParentStart="true"/>2017722WebJavapackageimportandroid.app.Activity;importandroid.content.Intent;import.Uri;importandroid.sup importandroid.os.Bundle;importandroid.view.View;importandroid.widget.Button;publicclassMainActivityextends tivity{protectedvoidonCreate(BundlesavedInstanceState)classWebActivityextendsActivity{protectedvoidonCreate(BundlesavedInstanceState){Buttonbutton=(Button)findViewById(R.id.button);button.setOnClickListener(newView.OnClickListener(){publicvoidonClick(Viewv){Intentintent=newIntent(); }}}}}<?xmlversion="1.0"encoding="utf- 2017724文 讀寫(xiě)實(shí)<?xmlversion="1.0"encoding="utf- <TextViewandroid:layout_width="wrap_content"android:text="@string/nametitle"/>android:id="@+id/textView"/><EditTextandroid:id="@+id/editname"android:layout_height="wrap_content"/>android:id="@+id/textView2"/><TextViewandroid:layout_width="wrap_content"android:text="@string/detailtitle"/><EditTextandroid:id="@+id/editdetail"android:minLines="2"/><Buttonandroid:id="@+id/btnsave"android:text="寫(xiě)入"/><Buttonandroid:id="@+id/btnclean"android:text="清空"/><Buttonandroid:id="@+id/btnread" 文件內(nèi)容"/>packagepimport import import importjava.io.FileInputStream;importjava.io.FileOutputStream;importjava.io.IOException;publicclassMainActivityextends ContextmContext=null;publicvoidonCreate(BundlesavedInstanceState){classFileHelperprivateContextmContext;publicFileHelper(){};publicFileHelper(ContextmContext)/**這里定義的是一個(gè)文件保存的方法，寫(xiě)入到文件中，所以是輸出流publicvoidsave(Stringfilename,Stringfilecontent)Exception//這里我們使用私有模式,創(chuàng)建出來(lái)的文件只能被本應(yīng) ,還會(huì)覆原文ContextmContext=FileOutputStreamoutput=output.write(filecontent.getBytes());//將String字符串以字節(jié)output.close();//關(guān)閉輸出}/**這里定義的是文 的方法*publicStringread(Stringfilename)throwsIOException{FileInputStreaminputmContext.openFileInput(filename);//打開(kāi)文件輸入byte[]temp=newbyte[1024];StringBuildersbnewStringBuilder("");intlen=0;/ while((len=input.read(temp))>0){sb.append(newString(temp,0,len));}input.close();//關(guān)閉輸入return}}2017725 packageimportimportandroid.sup importandroid.os.Bundle;importandroid.util.Log;importandroid.view.View;importandroid.widget.Button;/*publicclassMainActivityextends }publicclassMainActivityextendsActivityimplementsinti;//循環(huán)變privateThread 線程對(duì);publicvoidrun()while(!Thread.currentThread().isInterrupted())Log.i("循環(huán)變量}}protectedvoidonCreate(BundlesavedInstanceState){ButtonstartButton(Button)findViewById(R.id.button1);//獲startButton.setOnClickListener(newView.OnClickListener(){publicvoidonClick(Viewv){i=0;threadnewThread(MainActivity.this);//創(chuàng)建一個(gè)線程}ButtonstopButton(Button)findViewById(R.id.button2//獲stopButton.setOnClickListener(newView.OnClickListener(){publicvoidonClick(Viewv){if(thread!=null){errupt();//中斷線thread=}Log.i("提示：","中斷線程}}protectedvoidif(errupt();}//中斷線thread=}<?xmlversion="1.0"encoding="utf- android:layout_marginTop="137dp"/>android:layout_marginTop="53dp"/>2017726日：音 器實(shí)packageimport importandroid.sup importandroid.os.Bundle;importandroid.view.View;importandroid.widget.Button;publicclassMainActivityextends tivityprivateThreadthread;/ privatestatic yermp=null; 一個(gè) yer對(duì)protectedvoidonCreate(BundlesavedInstanceState){Buttonbutton(Button)findViewById(R.id.button//獲取布局button.setOnClickListener(newView.OnClickListener(){publicvoidonClick(Viewv){((Button)v).setEnabled(false);//設(shè)置按鈕不可//創(chuàng)建一個(gè)用 背景音樂(lè)的線thread=newThread(newRunnable(){publicvoidrun() yBGM(); 背景音}thread.start();//開(kāi)啟}}privatevoid yBGM(){if(mp!=null){mp.release();//釋放資}mp= yer.create(MainActivity.this,//開(kāi)//為 yer添 完 pletionListener(){publicvoid yermp)try{Thread.sleep(5000);//線程休眠5鐘}

yBGM();//重 音}catch(InterruptedExceptione){e.printStackTrace();}protectedvoidonDestroy(){if(mp!=null){mp.stop();//停止mp.release();//釋放資源mp=}if(thread!=null){thread=null;}}}<?xmlversion="1.0"encoding="utf- android:text="StartMusic"android:layout_centerHorizontal="true"/>2017727packageimportandroid.graphics.Bitmap;importandroid.graphics.BitmapFactory;importandroid.sup importandroid.os.Bundle;importimportjava.io.IOException;import.MalformedURLException;import.URL;importpublicclassMainActivityextends tivityprivateImageViewiv;/ ImageView件的對(duì)象protectedvoidonCreate(BundlesavedInstanceState)iv=(ImageView)//獲取布局管理器中添加的//創(chuàng)建一個(gè)新線程，用于從網(wǎng)絡(luò)上獲newThread(newRunnable(){publicvoidrun(){//從網(wǎng)絡(luò)上獲final ;}catch(InterruptedExceptione){}//發(fā)送一個(gè)Runnable對(duì)iv.post(newRunnable(){publicvoidrun(){//在ImageView顯示從網(wǎng)絡(luò)上獲取到}}}).start();//開(kāi)啟線}*功能，根 獲 對(duì)應(yīng)的Bitmap對(duì)@parampublicBitmapgetPicture(Stringpath){Bitmapbm=null;tryURLurl=newURL(path);//創(chuàng)建URLURLConnectionconn=url.openConnection();//獲取URL對(duì)象應(yīng)的連conn.connect();//打開(kāi)連Bitmap

InputStreamis=conn.getInputStream();//獲取輸入流對(duì)象bm=BitmapFactory.decodeStream(is);//根據(jù)輸入流對(duì)象創(chuàng)建}catch(MalformedURLExceptione1){}catch(IOExceptione)e.printStackTrace(