Android Open Soft Keyboard

<LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical" >    <!--define display soft keyboard buttons -    <ButtonAndroid:id= "@+id/btn_soft"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Eject/close soft keyboard" /></LinearLayout>

 Packagecom.example.yanlei.yl2;ImportAndroid.content.Context;ImportAndroid.os.Bundle;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.view.inputmethod.InputMethodManager;ImportAndroid.widget.Button; Public classMainactivityextendsappcompatactivity {//define a soft keyboard button    PrivateButton Btnsoft; //declaring Inputmethodmanager objectsInputmethodmanager IMM; //Declare a TextView@Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); //Get Inputmethodmanager ObjectIMM =(Inputmethodmanager) Getsystemservice (Context.input_method_service); //get all the objects in the layoutFindview (); //set listener for objectSetlistener (); }    Private voidFindview () {//get all the objects in the layoutBtnsoft =(Button) Findviewbyid (R.id.btn_soft); }    //set listener for object    Private voidSetlistener () {Btnsoft.setonclicklistener (listener); } Onclicklistener Listener=NewOnclicklistener () {@Override Public voidOnClick (View v) {//TODO auto-generated Method Stub//The first call is shown, then the call is hidden, so repeatedly//trigger the soft keyboard, inputmethodmanager.hide_not_always can be hidden normally, unless you encounter show_forced.Imm.togglesoftinput (0, inputmethodmanager.hide_not_always); }    };}

Android Open Soft Keyboard