【Android基础】Activity之间进行参数传递的三种方式

1.使用Intent进行传输

//发送数据的Activity
class button implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String ET_1String = ET_1.getText().toString();			//得到文本输入框中的文本
String ET_2String = ET_2.getText().toString();
Intent intent = new Intent();
intent.putExtra("one",ET_1String);						//进行参数的传递（“参数名字”，参数）
intent.putExtra("two",ET_2String);
intent.setClass(MainActivity.this, result.class);
MainActivity.this.startActivity(intent);
}
}

//接收数据的Activity
public class result extends Activity{
private TextView resulTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
resulTextView = (TextView)findViewById(R.id.TV_1);
Intent intent = getIntent();						//定义接收数据的Intent
String oneString = intent.getStringExtra("one");
String twoString = intent.getStringExtra("two");
int a = Integer.parseInt(oneString);				//进行计算之前要进行强制类型转换
int b = Integer.parseInt(twoString);
int c = a * b;
resulTextView.setText(c + "");						//要加一个空字符对int类型进行强制类型转换
}
}

2.使用静态变量进行传递

1.主界面(发送数据的Activity)

class ButtonListener implements android.view.View.OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setClass(MainActivity.this, OtherActivity.class);
OtherActivity.nameString = "zhao";
startActivity(intent);
}
}

2.接受数据Activity

public class OtherActivity extends Activity{
//定义静态变量
public static String nameString;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.otheractivity);
System.out.println("nameString-------->"+nameString);
}
}

3.利用setResult进行数据传输

//1.要关闭的页面
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.otheractivity);
Intent intent = this.getIntent();
intent.putExtra("tel", 12345);
//设置requestCode和带有数据的intent对象
OtherActivity.this.setResult(3, intent);
//马上关闭Activity
this.finish();
}

//2.上面的页面关闭时，此页面进行数据的接收
class ButtonListener implements android.view.View.OnClickListener{
@Override
public void onClick(View arg0) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, OtherActivity.class);
//与普通的start方法不同，需要设置requestCode
startActivityForResult(intent, 1);
}
}

//如果要进行此操作，需要在数据接收页面中复写activity的onActivityResul()方法
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
int tel = 0;
//根据返回码resultCode来判断下一步进行的业务代码
if(resultCode==3){
tel = data.getIntExtra("tel", 0);
}
Log.i(TAG, "tel--------->"+String.valueOf(tel));
}