Android several screen jumps to jump intent bundle_android

The screen uses an activity to realize, the screen is mutually independent, the jump relation between the screen realizes through the intent.

The screen jumps fall into the following categories:

1. Screen 1 jump directly to screen 2

Intent Intent = new Intent ();

Intent.setclass (screen 1 activity name. This, screen 2 activity name. Class);

StartActivity (Intent);

Finish (); End Current Activity

2. Screen 1 with parameters jump to screen 2

Use bundle to pass parameters.

Example: Scissors Game

Interface:

Important Code:

The choice of the computer is random, the basic idea of this contact is, three options use three numbers to replace, let the computer randomly generate a number, according to the different numbers to produce different results.

Copy Code code as follows:

public void OnClick (View v) {

Switch (Radiogroup.getcheckedradiobuttonid ()) {

Case R.id.stone:

Player = 0;

Break

Case R.id.scissors:

Player = 1;

Break

Case R.id.textile:

Player = 2;

Break

Default

Toast.maketext (mainactivity.this, "Please select", Toast.length_long). Show ();

Break

}

Skip ();

}

Page Jump

private void Skip () {

Intent Intent = new Intent ();

Intent.setclass (Mainactivity.this, Resultmainactivity.class);

Bundle Bundle = new Bundle ();

Bundle.putint ("Player", player);

Bundle.putint ("Computer", new Random (). Nextint (3));

Intent.putextra ("result", bundle);

StartActivity (Intent);

}

To accept parameters after a jump:

Copy Code code as follows:

Bundle Bundle = This.getintent (). Getbundleextra ("result");

int playerint = Bundle.getint ("player");

int computerint = Bundle.getint ("Computer");

Scissors Game Complete Code:

Activity_first.xml Code

Copy Code code as follows:

<linearlayout xmlns: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" >

<textview
Android:id= "@+id/textview1"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:text= "Please select the fist you want to give:"
Android:textsize= "20dip"/>

    <radiogroup
        android:id= "@+id/quans"
        android:layout_width= "Wrap_content"
         android:layout_height= "wrap_content"
        android:o rientation= "Horizontal"

        <radiobutton
             android:id= "@+id/shitou"
             android:layout_width= "Wrap_content"
             android:layout_height= "Wrap_content"
             android:checked= "true"
            android:text= "Stone"
            android:textsize= "20dip" "/>

        <radiobutton
             android:id= "@+id/jiandao"
             android:layout_width= "Wrap_content"
             android:layout_height= "Wrap_content"
             android:textsize= "20dip"
            android:text= "Scissors"/>

        <radiobutton
             android:id= "@+id/bu"
             android:layout_width= "Wrap_content"
             android:layout_height= "Wrap_content"
             android:textsize= "20dip"
            android: text= "cloth"/>
    </radiogroup>

<button
Android:id= "@+id/chuquan"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content"
Android:textsize= "20dip"
Android:text= "Out fist"/>

</LinearLayout>

Activity_second.xml Code

Copy Code code as follows:

<linearlayout xmlns: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" >

<textview
Android:id = "@+id/show"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content"
Android:textsize= "20dip"
android:text= "@string/hello_world"/>

</LinearLayout>

Firstactivity.java Code

Copy Code code as follows:

Package com.example.caiquangame;

Import Java.util.Random;

Import Android.os.Bundle;
Import android.app.Activity;
Import android.content.Intent;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;
Import Android.widget.RadioGroup;
Import Android.widget.Toast;
Import Android.support.v4.app.NavUtils;

public class Firstactivity extends activity {

Private Button Chuquan;
Private Radiogroup Quans;
private int player;
@Override
public void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_first);
Settitle ("Scissors Game");

Chuquan = (Button) Findviewbyid (R.id.chuquan);
Chuquan.setonclicklistener (Mchuquanlistener);
Quans = (radiogroup) Findviewbyid (R.id.quans);
}

Private Onclicklistener Mchuquanlistener = new Onclicklistener ()
{

@Override
public void OnClick (View arg0) {
TODO auto-generated Method Stub
Switch (Quans.getcheckedradiobuttonid ())
{
Case R.id.shitou:
Player = 0;
Break
Case R.id.jiandao:
Player = 1;
Break
Case R.ID.BU:
Player = 2;
Break
Default
Toast.maketext (firstactivity.this, "Please select", Toast.length_long). Show ();
Break
}
Pass the value to the Secondactivity
Skip ();
}

};

private void Skip ()
{
Intent Intent = new Intent ();
Intent.setclass (Firstactivity.this, Secondactivity.class);
Bundle Bundle = new Bundle ();
Bundle.putint ("Player", player);
Bundle.putint ("Computer", new Random (). Nextint (3));
Intent.putextra ("result", bundle);
StartActivity (Intent);
}

}

Secondactivity.java Code

Copy Code code as follows:

Package com.example.caiquangame;

Import Android.os.Bundle;
Import android.app.Activity;
Import Android.view.Menu;
Import Android.view.MenuItem;
Import Android.widget.TextView;
Import Android.widget.Toast;
Import Android.support.v4.app.NavUtils;

public class Secondactivity extends activity {
Private TextView TV;
@Override
public void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_second);
Settitle ("result");
TV = (TextView) Findviewbyid (r.id.show);

Bundle Bundle = This.getintent (). Getbundleextra ("result");
int playerint = Bundle.getint ("player");
int computerint = Bundle.getint ("Computer");

Tv.settext ("scissors result \ n");
Tv.append ("Your choice:");
Intchangestring (Playerint);
Tv.append ("Computer choice:");
Intchangestring (Computerint);
Tv.append ("Result:");
if (playerint = 0)
{
if (computerint = 0)
{
Tv.append ("Draw");
}
else if (Computerint = 1)
{
Tv.append ("You are the winner");
}
Else
{
Tv.append ("Computer is the winner");
}
}
else if (Playerint = 1)
{
if (computerint = 0)
{
Tv.append ("Computer is the winner");
}
else if (Computerint = 1)
{
Tv.append ("Draw");
}
Else
{
Tv.append ("You are the winner");
}
}
Else
{
if (computerint = 0)
{
Tv.append ("You are the winner");
}
else if (Computerint = 1)
{
Tv.append ("Computer is the winner");
}
Else
{
Tv.append ("Draw");
}
}
}

private void intchangestring (int n)
{
Switch (n)
{
Case 0:
Tv.append ("Stone \ n");
Break
Case 1:
Tv.append ("scissors \ \");
Break
Case 2:
Tv.append ("cloth \ n");
Break
Default
Toast.maketext (secondactivity.this, "error", Toast.length_long). Show ();
Break
}
}

}

3. Screen 1 jump to screen 2, screen 2 after the completion of the return value to screen 1 (with return value jump)

Reference Sample program: Receiveresult (Apidemo => app=>activity=>receiveresult)

Important Code:

Copy Code code as follows:

Screen 1 turn to screen 2

Intent Intent = new Intent (forward.this,forwardtargetactivity.class);

Startactivityforresult (Intent, Get_code);

Set the return value on screen 2

Setresult (RESULT_OK, (New Intent ()). Setaction ("violet!"));

Finish ();

In screen 1 get the content returned from screen 2

@Override

protected void Onactivityresult (int requestcode,int resultcode,intent data)

{

if (Requestcode = = Get_code)

{

if (ResultCode = = result_canceled)

{

Edit.append ("canceled!");

}

Else

{

Edit.append ("(okay");

Edit.append (integer.tostring (ResultCode));

Edit.append (")");

}

if (data!=null)

{

Edit.append (Data.getaction ());

}

}

Edit.append ("\ n");

}