在Activity之间传递参数(一)
准备:
一、创建主界面:activity_main.xml文件中<Button android:text="启动另一个Activity" android:id="@+id/btnStartAty" />
二、创建另一个Activity界面:java文件夹中创建一个TheAty;activity_the_aty.xml文件中<TextView android:id="@+id/tv"/>
传递简单数据:
1、MainActivity.class:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.btnStartAty).setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Intent i = new Intent(MainActivity.this,TheAty.class);
i.putExtra("data","Hello Android!");
startActivity(i);
}
});
}
2、TheAty.class:
public class TheAty extends AppCompatActivity {
private TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_the_aty);
Intent i = getIntent();
tv =(TextView)findViewById(R.id.tv);
tv.setText(i.getStringExtra("data"));
}
}