本文介绍了在Android应用程序中，如何从一个活动（Activity）向另一个活动传递数据，并展示了通过Intent携带参数的具体实现方式。
文件MainActivity.java和XiuGaiActivity.java
MainActivity.java
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(MainActivity.this, XiuGaiActivity.class);
intent.putExtra("id",id);
startActivityForResult(intent, 20);
}
});
XiuGaiActivity.java
int id = (int)getIntent().getLongExtra("id", -1);
Book b = new BookDAO(this).find(id);
smet.setText(b.getName());
xset.setText(b.getExp());
MainActivity.java
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(MainActivity.this, XiuGaiActivity.class);
intent.putExtra("id",id);
startActivityForResult(intent, 20);
}
});
XiuGaiActivity.java
int id = (int)getIntent().getLongExtra("id", -1);
Book b = new BookDAO(this).find(id);
smet.setText(b.getName());
xset.setText(b.getExp());
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