【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));
	}