Android Activity之间通信

package com.example.myapp;

import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MyActivity extends Activity {

private Button btnOk = null;

/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

btnOk = (Button)findViewById(R.id.btnCallOther);
btnOk.setOnClickListener(new MyButtonListener());

}

class MyButtonListener implements View.OnClickListener {

@Override
public void onClick(View view) {
Intent intent = new Intent();

intent.putExtra("key","value");

intent.setClass(MyActivity.this,otherActivity.class);

MyActivity.this.startActivity(intent);
}
}
}

package com.example.myapp;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

/**
* Created by chang on 14-9-17.
*/
public class otherActivity extends Activity{
private TextView tv = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.other);

Intent intent = getIntent();

String s = intent.getStringExtra("key");

tv = (TextView)findViewById(R.id.otherTextView);
tv.setText(s);
}
}