在发送活动中尝试以下代码

   //EXTRA_MESSAGE is our key and it's value is 'packagename.MESSAGE'
    public static final String EXTRA_MESSAGE = "packageName.MESSAGE";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       ....

        //Here we declare our send button
        Button sendButton = (Button) findViewById(R.id.send_button);
        sendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //declare our intent object which takes two parameters, the context and the new activity name

                // the name of the receiving activity is declared in the Intent Constructor
                Intent intent = new Intent(getApplicationContext(), NameOfReceivingActivity.class);

                String sendMessage = "hello world"
                //put the text inside the intent and send it to another Activity
                intent.putExtra(EXTRA_MESSAGE, sendMessage);
                //start the activity
                startActivity(intent);

            }

从接收活动尝试以下代码:

   protected void onCreate(Bundle savedInstanceState) {
 //use the getIntent()method to receive the data from another activity
 Intent intent = getIntent();

//extract the string, with the getStringExtra method
String message = intent.getStringExtra(NewActivityName.EXTRA_MESSAGE);

然后将以下代码添加到AndroidManifest.xml文件中

  android:name="packagename.NameOfTheReceivingActivity"
  android:label="Title of the Activity"
  android:parentActivityName="packagename.NameOfSendingActivity"

Button button = findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(SplashActivity.this,HomeActivity.class);
            startActivity(intent);
        }
    });

你可以试试下面的代码:

Intent myIntent = new Intent();
FirstActivity.this.SecondActivity(myIntent);

从这个活动启动另一个活动，你也可以通过Bundle对象传递参数。

Intent intent = new Intent(getBaseContext(), YourActivity.class);
intent.putExtra("USER_NAME", "xyz@gmail.com");
startActivity(intent);

在另一个活动(YourActivity)中检索数据

String s = getIntent().getStringExtra("USER_NAME");

Intent i = new Intent(firstactivity.this, secondactivity.class);
startActivity(i);

启动新活动的方法是广播一个意图，您可以使用特定类型的意图将数据从一个活动传递到另一个活动。我的建议是你去看看Android开发者文档中与intent相关的内容;这是一个丰富的信息的主题，并有例子。