android中Activity之間的操作。傳資料，取得資料，返回前一個Activity資料

1：從A--Activity到達B--Activity

Intent intent = new Intent();intent.setClass(BundleDemoActivity.this, otherActivity.class);

2:從A--Activity傳輸資料到B--Activity

Intent intent = new Intent();intent.setClass(BundleDemoActivity.this, otherActivity.class);Bundle bundle = new Bundle();bundle.putDouble("height", height);bundle.putString("sex", sex);intent.putExtras(bundle);

3：從B---Activity中取得前面A--Activity裡面的資料：

Bundle bundle = this.getIntent().getExtras();String sex = bundle.getString("sex");double height = bundle.getDouble("height");

4：當從B--Activity中返來的時候，A—Activity中的資料任然存在。

則在A--Ativity中作如下操作：

public void onClick(View arg0) {// TODO Auto-generated method stubet = (EditText) findViewById(R.id.height);double height = Double.parseDouble(et.getText().toString());String sex = "";rb1 = (RadioButton) findViewById(R.id.sex1);rb2 = (RadioButton) findViewById(R.id.sex2);if (rb1.isChecked()) {sex = "M";} else {sex = "F";}Intent intent = new Intent();intent.setClass(BundleDemoActivity.this, otherActivity.class);Bundle bundle = new Bundle();bundle.putDouble("height", height);bundle.putString("sex", sex);intent.putExtras(bundle);startActivityForResult(intent, 0);}}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubswitch(resultCode){case RESULT_OK:Bundle bundle = data.getExtras();String sex = bundle.getString("sex");double height = bundle.getDouble("height");et.setText(""+height);if(sex.equals("M")){rb1.setChecked(true);}else{rb2.setChecked(true);}break;default:break;}}

同時要在B--Activity中也要做操作：

 button  =(Button) findViewById(R.id.button);  button.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubotherActivity.this.setResult(RESULT_OK, getIntent());otherActivity.this.finish();}});