How Android uses the Clipboard to pass simple data and complex data

The scene that passes the data is to jump between different pages, need to carry the data: simple data value refers to a string, int and other data, complex data refers to the class

1. Use the Clipboard to pass a simple data method:

The first page inside the data operation is as follows:

1   Clipboardmanager Clipboardmanager = (Clipboardmanager); 2   Getsystemservice (context.clipboard_service);          3   String Text = "simple data"; 4   clipboardmanager.settext (text); 5   New Intent (This, otheractivity.  Class); 6   StartActivity (Intent);

The second page takes data operations as follows:

  Intent Intent = Getintent ();  TextView = Findviewbyid (r.id.msgtext);  MyApp = (MyApp) getapplication ();  Textview.settext ("After changed:" + Myapp.gettext ());            

Where MyApp is a class file with the following:

public class MyApp extends application {    private String text;    Public String GetText () {        return text;    }    public void SetText (String text) {        this.text = text;    }}

Add the MyApp class to the manifest file:

<?xml version= "1.0" encoding= "Utf-8"? ><manifest xmlns:android= "http://schemas.android.com/apk/res/ Android "    package=" Com.example.xxx.globalvariables ">    <application        android:name=". MyApp "        android:allowbackup=" true "        android:icon=" @mipmap/ic_launcher "        android:label=" @string/ App_name "        android:roundicon=" @mipmap/ic_launcher_round "        android:supportsrtl=" true "        android:theme=" @style/apptheme ">        <activity android:name=". Mainactivity ">            <intent-filter>                <action android:name=" Android.intent.action.MAIN "/>                <category android:name= "Android.intent.category.LAUNCHER"/>            </intent-filter>        </ activity>        <activity android:name= ". Otheractivity "></activity>    </application></manifest>

2. Using the Clipboard to pass a complex data transfer method

The first page to store data is as follows:

Method Two: Clipboard passes complex data        MyData MyData = new MyData ("Jack");        Converts an object to a string        bytearrayoutputstream Bytearrayoutputstream = new Bytearrayoutputstream ();        String base64string = "";        try {            ObjectOutputStream objectoutputstream = new ObjectOutputStream (bytearrayoutputstream);            Objectoutputstream.writeobject (myData);            base64string = base64.encodetostring (Bytearrayoutputstream.tobytearray (), base64.default); Encrypt            objectoutputstream.close ();        } catch (IOException e) {            e.printstacktrace ();        }        Clipboardmanager clipboardManager1 = (clipboardmanager) getsystemservice (context.clipboard_service);        Clipboardmanager1.settext (base64string);        Intent intent1 = new Intent (this, otheractivity.class);        StartActivity (INTENT1);

The second page is the method of fetching data:

            Intent Intent = Getintent ();

Clipboardmanager Clipboardmanager = (clipboardmanager) getsystemservice (clipboard_service);            String msg = Clipboardmanager.gettext (). toString ();            Clipboardtextview = Findviewbyid (R.id.clipboardmsgtext); Decode            byte[] base64_byte = Base64.decode (msg, base64.default);            Bytearrayinputstream Bytearrayinputstream = new Bytearrayinputstream (base64_byte);            ObjectInputStream objectinputstream = null;            try {                ObjectInputStream = new ObjectInputStream (bytearrayinputstream);                MyData MyData = (MyData) objectinputstream.readobject ();                Clipboardtextview.settext (Mydata.tostring ());            } catch (Exception e) {                e.printstacktrace ();            }

MyData is a class that includes the name, the Get method for age, and the ToString () method, which needs to implement

Serializable

Note: Because the class is a normal class, there is no inheritance

Application, so no more configuration in manifest file!

How Android uses the Clipboard to pass simple data and complex data