編輯:關於Android編程
界面文件activity_main.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34<
RelativeLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
xmlns:tools
=
"http://schemas.android.com/tools"
android:layout_width
=
"match_parent"
android:layout_height
=
"match_parent"
android:paddingBottom
=
"@dimen/activity_vertical_margin"
android:paddingLeft
=
"@dimen/activity_horizontal_margin"
android:paddingRight
=
"@dimen/activity_horizontal_margin"
android:paddingTop
=
"@dimen/activity_vertical_margin"
tools:context
=
"com.example.activity_03.MainActivity"
>
<
EditText
android:id
=
"@+id/factor_one"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
/>
<
TextView
android:id
=
"@+id/symbol"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:layout_below
=
"@+id/factor_one"
/>
<
EditText
android:id
=
"@+id/factor_two"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:layout_below
=
"@+id/symbol"
/>
<
Button
android:id
=
"@+id/multiply"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:layout_below
=
"@+id/factor_two"
/>
RelativeLayout
>
界面文件result.xml
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
LinearLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:layout_width
=
"match_parent"
android:layout_height
=
"match_parent"
android:orientation
=
"vertical"
>
<
TextView
android:id
=
"@+id/result"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
/>
LinearLayout
>
MainActivity.java
public
class
MainActivity
extends
ActionBarActivity {
private
EditText factor_one;
private
EditText factor_two;
private
TextView symbol;
private
Button multiply;
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
factor_one = (EditText) findViewById(R.id.factor_one);
factor_two = (EditText) findViewById(R.id.factor_two);
symbol = (TextView) findViewById(R.id.symbol);
multiply = (Button) findViewById(R.id.multiply);
symbol.setText(R.string.symbol);
multiply.setText(
"計算"
);
multiply.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
// TODO Auto-generated method stub
String factor_one_str = factor_one.getText().toString();
String factor_two_str = factor_two.getText().toString();
Intent intent =
new
Intent();
intent.putExtra(
"factor_one_str"
, factor_one_str);
intent.putExtra(
"factor_two_str"
, factor_two_str);
intent.setClass(MainActivity.
this
, ResultActivity.
class
);
MainActivity.
this
.startActivity(intent);
}
});
}
@Override
public
boolean
onCreateOptionsMenu(Menu menu) {
//設置菜單
//MenuItem android.view.Menu.add(int groupId, int itemId, int order, int titleRes)
menu.add(
0
,
1
,
1
, R.string.about);
menu.add(
0
,
2
,
2
, R.string.exit);
return
super
.onCreateOptionsMenu(menu);
}
@Override
public
boolean
onOptionsItemSelected(MenuItem item) {
//選中菜單選項之後進行的操作
if
(item.getItemId() ==
1
) {
//關於
}
else
if
(item.getItemId() ==
2
) {
//退出
finish();
}
return
super
.onOptionsItemSelected(item);
}
}
ResultActivity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18public
class
ResultActivity
extends
Activity{
private
TextView result;
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.result);
String factor_one_str = getIntent().getStringExtra(
"factor_one_str"
);
String factor_two_str = getIntent().getStringExtra(
"factor_two_str"
);
int
factor_one = Integer.parseInt(factor_one_str);
int
factor_two = Integer.parseInt(factor_two_str);
result = (TextView) findViewById(R.id.result);
result.setText(factor_one * factor_two +
""
);
}
}
strings.xml
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
resources
>
<
string
name
=
"app_name"
>Activity_03
string
>
<
string
name
=
"hello_world"
>Hello world!
string
>
<
string
name
=
"action_settings"
>Settings
string
>
<
string
name
=
"symbol"
>乘以
string
>
<
string
name
=
"exit"
>退出
string
>
<
string
name
=
"about"
>關於
string
>
resources
>
AndroidManifest.xml 中注冊Activity
<
activity
android:name
=
".ResultActivity"
android:label
=
"ResultActivity"
/>
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