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Android学习笔记-EditText&TextView&Button&菜单栏
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 > |
1 2 3 4 5 6 7 8 9 10 11 12 | <? 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 > |
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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | 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( "计算" ); 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) { //设置菜单 //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) { //选中菜单选项之后进行的操作 if (item.getItemId() == 1 ) { //关于 } else if (item.getItemId() == 2 ) { //退出 finish(); } return super .onOptionsItemSelected(item); } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | public 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 + "" ); } } |
1 2 3 4 5 6 7 8 9 10 | <? 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" >关于</ string > </ resources > |
1 | < activity android:name = ".ResultActivity" android:label = "ResultActivity" /> |
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Android学习笔记-EditText&TextView&Button&菜单栏
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