Transfer objects between Android activity

<span id="Label3"></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">In many cases, we need to pass objects between the activity, such as when you click on the item of a list and need to pass it to the next activity, what do we need to do?</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">Android supports two ways of passing objects, one is bundle.putserializable, and the other is Bundle.putparcelable.</span></p></p><p><p><span style="font-family:‘Comic Sans MS‘"><span style="font-size:18px"><br></span></span></p></p><p><p><span style="font-family:‘Comic Sans MS‘"><span style="font-size:18px">So let's use an example to practice the object of activity:</span></span></p></p><p><p><span style="font-family:‘Comic Sans MS‘"><span style="font-size:18px"><br></span></span></p></p><p><p><span style="font-family:‘Comic Sans MS‘"><span style="font-size:18px">1. First establish two classes, one teacher class to represent the teacher, and one student class to represent the Students. The contents were as Follows:</span></span></p></p><p><p><span style="font-size:18px"><span style="font-family:‘Comic Sans MS‘"></span></span></p></p><pre name="code" class="java"><pre name="code" class="java"><span style= "font-size:18px;" >public class Teacher implements Serializable {private static final long Serialversionuid = -7060210544600464481l;priv Ate string name;private int age;private string addr;public Teacher (string name, int age, string Addr) {super (); this.name = Name;this.age = AGE;THIS.ADDR = addr;} Public String getName () {return name;} public void SetName (String Name) {this.name = name;} public int getage () {return age;} public void setage (int.) {this.age = age;} Public String getaddr () {return addr;} public void setaddr (String Addr) {this.addr = addr;} @Overridepublic string toString () {string temp = "teacher name:" + this.name + "age:" + this.age + "address:" + this.addr;return temp;} }</span></pre></pre><p><p></p></p><p><p><span style="font-family:‘Comic Sans MS‘"><span style="font-size:18px"><br></span></span></p></p><pre name="code" class="java"><span style= "font-size:18px;" >import Android.os.parcel;import Android.os.parcelable;public class Student implements Parcelable {private String name;private int age;private String addr;public static final parcelable.creator<student> Creator = new Creator<s tudent> () {@Overridepublic student[] newarray (int size) {return New student[size];} @Overridepublic Student createfromparcel (Parcel source) {Student stu = new Student (); stu.name = source.readstring (); Stu.age = source.readint (); stu.addr = source.readstring (); return stu;}}; @Overridepublic int describecontents () {//TODO auto-generated method Stubreturn 0;} @Overridepublic void writetoparcel (Parcel dest, int Flags) {dest.writestring (name);d est.writeint (age); Dest.writestring (addr);} Public Student () {}public-Student (string name, int age, string Addr) {super (); this.name = name;this.age = Age;this.addr = A ddr;} Public String getName () {return name;} public void SetName (String Name) {this.name = name;} public int Getage () {return Age;} public void setage (int.) {this.age = age;} Public String getaddr () {return addr;} public void setaddr (String Addr) {this.addr = addr;} @Overridepublic string toString () {string temp = "student name:" + this.name + "age:" + this.age + "address:" + this.addr;return temp;} }</span></pre><span style="font-size:18px"><span style="font-size:18px"><br><br></span></span><p><p><span style="font-size:18px"><span style="font-family:Comic Sans MS">Where the teacher class implements the serializable interface, the student class implements the Parcelable Interface.</span></span></p></p><p><p><span style="font-size:18px"><span style="font-family:Comic Sans MS"><br></span></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">2. Create two activity, the first activity is called firstactivity, it has two objects: a teacher object, a student object, we now need to pass these two objects to the second activity, That is Secondactivity.</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">First we look at the layout of the Firstactivity:</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">The contents of firstactivity are as Follows:</span></p></p><p><p> <span style="font-family:comic Sans MS; font-size:18px"> </span> </p> </p><pre name="code" class="java">Import Android.os.bundle;import android.app.activity;import Android.content.intent;import Android.view.Menu;import Android.view.view;import Android.view.view.onclicklistener;public class Firstactivity extends Activity implements Onclicklistener{public static final String teacher_key = "key_teacher";p ublic static final string student_key = "key_stude NT ";p rivate Teacher Teacher = new Teacher (" Liu Bei ", 36," Jingzhou ");p rivate Student Student = new Student (" Zhang Fei ", 32," xinye "); @Overridep rotected void onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview ( r.layout.activity_first); Findviewbyid (r.id.button1). Setonclicklistener (this);} @Overridepublic void OnClick (View v) {switch (v.getid ()) {case r.id.button1:bundle bundle = new bundle (); bundle.putserial Izable (teacher_key, TEACHER); bundle.putparcelable (student_key, STUDENT); Intent Intent = new Intent ( firstactivity.this,secondactivity.class); Intent.putextras (bundle); startactivity (intent); break;default:break;}}</pre><p><p></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><span style="font-family:Comic Sans MS; font-size:18px"><span style="font-family:Comic Sans MS; font-size:18px">then we'll look at the layout of the Secondactivity:</span></span><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span><span style="font-family:Comic Sans MS; font-size:18px">There is only one textview.</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">Then we take a look at the content of secondactivity, which mainly shows the objects passed to the Textview:</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"></span></p></p><pre name="code" class="java"><pre name="code" class="java">Import Android.os.bundle;import android.app.activity;import Android.content.intent;import Android.view.Menu;import Android.widget.textview;public class Secondactivity extends Activity {@Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); setcontentview (r.layout.activity_second); Intent Intent = This.getintent (); Bundle bundle = Intent.getextras (); Teacher t = (Teacher) bundle.getserializable (firstactivity.teacher_key); Student s = bundle.getparcelable (firstactivity.student_key); String Text = t.tostring () + "\ n" + s.tostring ();((TextView) Findviewbyid (r.id.text_view)). setText (text);}}</pre></pre><br><span style="font-family:Comic Sans MS; font-size:18px"><span style="font-family:Comic Sans MS; font-size:18px">when we click on the "start passing object" button on the firstactivity interface, we jump to secondactivity with the following interface:</span></span><p><p></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">obviously, both of these methods can successfully pass objects between the Activity.</span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px"><br></span></p></p><p><p><span style="font-family:Comic Sans MS; font-size:18px">Hope that the above content for your readers can bring help!</span></p></p> <p style="font-size:12px;"><p style="font-size:12px;">Copyright Notice: This article for Bo Master original article, without Bo Master permission not Reproduced.</p></p> <p><p>Transfer objects between Android activity</p></p></span>