思路:
使用Intent.putExtra() 方法将数据暂存在Intent中,启动另一个活动后,在从Intent中取出
将FirstActivity中的一个字符串传递到SecondActivity中
FirstActivity代码如下
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first_layout);
Button button1=(Button) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String data = "hello SecondActivety";
Intent intent=new Intent(MainActivity.this,SecondActivity.class);//显式Intent
intent.putExtra("extra_data",data);
startActivity(intent);
}
});
}
}
SecondActivity代码如下
public class SecondActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_layout);
Intent intent = getIntent();
String data=intent.getStringExtra("extra_data");
Log.d("SecondActivity",data);
Toast.makeText(SecondActivity.this,data,Toast.LENGTH_SHORT).show();
}