以Intent啟動其它Activity

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public class MainActivity extends Activity {

private EditText medtName, medtAge;
private Button mbtnOK;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

medtName = (EditText) findViewById(R.id.edtName);
medtAge = (EditText) findViewById(R.id.edtAge);
mbtnOK = (Button) findViewById(R.id.btnOK);

mbtnOK.setOnClickListener(mbtnOKOnClickListener);
}

private View.OnClickListener mbtnOKOnClickListener = new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent it = new Intent(MainActivity.this, SecondActivity.class);

// it.putIntExtra("姓名", "John"); // 存入以「姓名」為鍵值的資料「John」
it.putExtra(getString(R.string.s_txtName), medtName.getText().toString());
it.putExtra(getString(R.string.s_txtAge), medtAge.getText().toString());

startActivity(it);
}
};
}

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public class SecondActivity extends Activity {

private TextView mtxtName2, mtxtAge2;

private Button mbtnPrv;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_second);

mtxtName2 = (TextView) findViewById(R.id.txtName2);

mtxtAge2 = (TextView) findViewById(R.id.txtAge2);

mbtnPrv = (Button) findViewById(R.id.btnPrv);

mbtnPrv.setOnClickListener(mbtnPrvOnClickListener);

Intent it = getIntent();

// it.getStringExtra("姓名"); 讀出名為「姓名」的 String 資料

// it.getIntExtra("年齡", 18); 讀出名為「年齡」的 Int 資料, 若沒有則傳回 18

String tmpName = it.getStringExtra(getString(R.string.s_txtName)); 

String tmpAge = it.getStringExtra(getString(R.string.s_txtAge));

mtxtName2.setText(getString(R.string.s_txtName) + tmpName);

mtxtAge2.setText(getString(R.string.s_txtAge) + tmpAge);

}

private View.OnClickListener mbtnPrvOnClickListener = new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

finish();

}

};

}

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範例下載