Summary of the steps to create Activity jumps in Android

1. Create the project

file- > new- > Fill in the application name, project name, and package name
Found in the project directory src/com example. helloworld MainActivity. java

2. Add code

package com.example.helloworld;
import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;


public class MainActivity extends Activity 

{

    private Button button;

 @Override

 protected void onCreate(Bundle savedInstanceState)

 {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  

     this.button = (Button) this.findViewById(R.id.button1);

         this.button.setOnClickListener(new OnClickListener() {

             @Override

             public void onClick(View v) {

                 Intent intent = new Intent();

                 intent.setClass(MainActivity.this, IntentActivity.class);

                 intent.putExtra("name", "Hello World");

                 startActivity(intent);

             }

         }); 

 } 

}

Before adding code, drag and drop 1 Button control onto res/layout/ es25EN_main.xml. The Button message is automatically generated in ES29en_main.xml. Note that the id value is useful if you use this Button

3. Add jump Activity

1, right-click the src/com. example. helloworld, new - > class, fill in IntentActivity at name, don't add java
2. Add layout. Right click on res/layout, new- > android XML file, drag 1 TextView onto this xml. The address of TextView is automatically added to R.java
3. Add the following code to ES65en. xml: Complete the registration of Activity

<activity 

   android:name="com.example.helloworld.IntentActivity"> </activity>

3. Implement IntentActivity. java

package com.example.helloworld;
import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

import android.content.Intent;

public class IntentActivity extends Activity

{

 @Override

 protected void onCreate(Bundle savedInstanceState)

 {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_intent);

  Intent intent = getIntent();

  String string = intent.getStringExtra("name");
  TextView textView = new TextView(this);

  textView.setTextSize(40);

  textView.setText(string);

  

  setContentView(textView);

 }

}

4. Run

Turn on the simulator or your phone and run.