Android开发七--基础UI编程2

Android开发七--基础UI编程2 -----------------------------------Android编程基础 1 封面 -----------------------------------Android编程基础 2 AndroidAndroidAndroidAndroid 基础 UIUIUIUI编程 2222 标题、状态栏的隐藏标题栏隐藏在 Activity.setCurrentView();之前调用此方法状态栏隐藏(全屏) 在 Activity.setCurrentView();之前调用此方法 ...

-----------------------------------Android编程基础 1 封面 -----------------------------------Android编程基础 2 AndroidAndroidAndroidAndroid 基础 UIUIUIUI编程 2222 标题、状态栏的隐藏标题栏隐藏在 Activity.setCurrentView();之前调用此方法状态栏隐藏(全屏) 在 Activity.setCurrentView();之前调用此方法 privateprivateprivateprivate voidvoidvoidvoid HideTitle() { // TODOTODOTODOTODO Auto-generated method stub requestWindowFeature(Window.FEATURE_NO_TITLE); } privateprivateprivateprivate voidvoidvoidvoid HideStatusBar() { // TODOTODOTODOTODO Auto-generated method stub //隐藏标题 requestWindowFeature(Window.FEATURE_NO_TITLE); //定义全屏参数 intintintint flag=WindowManager.LayoutParams.FLAG_FULLSCREEN; //获得窗口对象 Window myWindow=thisthisthisthis.getWindow(); //设置Flag标识 myWindow.setFlags(flag,flag); } -----------------------------------Android编程基础 3 样式化的定型对象 Style 样式的定义 ① 新建工程 ② 定义一个 style.xml存放样式 ③ 在 string.xml 中添加字符串 ④ 修改布局main.xml，添加两个 TextView 应用myStyle_Text1 应用myStyle_Text2 -----------------------------------Android编程基础 4 ⑤ 加入 Style ⑥ 结果： -----------------------------------Android编程基础 5 简易的按钮事件 Button 事件处理 ① 创建新工程 ② 修改main.xml 布局，添加一个 TextView和一个 Button ③ 在mainActivity.java中 findViewByID()获取 TextView和 Button资源 ④ 给 Button添加事件监听器 Button.OnClickListener() packagepackagepackagepackage zyf.Ex8_UI; importimportimportimport android.app.Activity;/* import 相关class */ importimportimportimport android.os.Bundle; importimportimportimport android.view.View; importimportimportimport android.widget.Button; publicpublicpublicpublic classclassclassclass Ex8_UI extendsextendsextendsextends Activity { /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { -----------------------------------Android编程基础 9 ⑦ 结果 supersupersupersuper.onCreate(savedInstanceState); /* 载入main.xml Layout */ setContentView(R.layout.main);// 默认启动布局 /* 以findViewById()取得Button 对象，并添加onClickListener */ Button b1 = (Button) findViewById(R.id.button1); b1.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { jumpToLayout2();// 调用跳转方法jumpToLayout2() } }); } /* method jumpToLayout2：将layout 由main.xml 切换成mylayout.xml */ publicpublicpublicpublic voidvoidvoidvoid jumpToLayout2() { /* 将layout 改成mylayout.xml */ setContentView(R.layout.mylayout); /* 以findViewById()取得Button 对象，并添加onClickListener */ Button b2 = (Button) findViewById(R.id.button2); b2.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { jumpToLayout1();// 调用跳转方法jumpToLayout1() } }); } /* method jumpToLayout1：将layout 由mylayout.xml 切换成main.xml */ publicpublicpublicpublic voidvoidvoidvoid jumpToLayout1() { /* 将layout 改成main.xml */ setContentView(R.layout.main); /* 以findViewById()取得Button 对象，并添加onClickListener */ Button b1 = (Button) findViewById(R.id.button1); b1.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { jumpToLayout2();// 调用跳转方法jumpToLayout2() } }); } } -----------------------------------Android编程基础 10 调用另一个 ActivityActivityActivityActivity Intent 对象的使用 ① 新建工程 ② 在 string.xml 中添加两个字符串 ③ 新建 color.xml 存放颜色值 ④ 修改main.xml 布局，添加一个 TextView和一个 Button Hello World, Ex9_UI! Ex9_UI This is Activity 1! This is Activity 2! #000000 #FFFFFFFF packagepackagepackagepackage zyf.Ex9_UI; importimportimportimport android.app.Activity; importimportimportimport android.content.Intent; importimportimportimport android.os.Bundle; importimportimportimport android.view.View; importimportimportimport android.widget.Button; publicpublicpublicpublic classclassclassclass SecondActivity extendsextendsextendsextends Activity { -----------------------------------Android编程基础 12 ⑦ 修改mainActivity.java,添加代码 /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { supersupersupersuper.onCreate(savedInstanceState); /* 载入mylayout.xml Layout */ setContentView(R.layout.mylayout); /* 以findViewById()取得Button 对象，并添加onClickListener */ Button b2 = (Button) findViewById(R.id.button2); b2.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { /* new 一个Intent 对象，并指定要启动的class */ Intent intent = newnewnewnew Intent(); intent.setClass(SecondActivity.thisthisthisthis, Ex9_UI.classclassclassclass); /* 调用一个新的Activity */ startActivity(intent); /* 关闭原本的Activity */ SecondActivity.thisthisthisthis.finish(); } }); } } packagepackagepackagepackage zyf.Ex9_UI; importimportimportimport android.app.Activity; importimportimportimport android.content.Intent; importimportimportimport android.os.Bundle; importimportimportimport android.view.View; importimportimportimport android.widget.Button; publicpublicpublicpublic classclassclassclass Ex9_UI extendsextendsextendsextends Activity { /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { supersupersupersuper.onCreate(savedInstanceState); /* 载入main.xml Layout */ setContentView(R.layout.main); /* 以findViewById()取得Button 对象，并添加onClickListener */ Button b1 = (Button) findViewById(R.id.button1); b1.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { /* new 一个Intent 对象，并指定要启动的class */ Intent intent = newnewnewnew Intent(); -----------------------------------Android编程基础 13 ⑧ 在 AndroidManifest.xml 文件中添加 SecondActivity ⑨ 结果 intent.setClass(Ex9_UI.thisthisthisthis, SecondActivity.classclassclassclass); /* 调用一个新的Activity */ startActivity(intent); /* 关闭原本的Activity */ Ex9_UI.thisthisthisthis.finish(); } }); } }

-----------------------------------Android编程基础 14 不同 ActivityActivityActivityActivity之间的数据传递 Bundle 对象的实现 ① 新建工程 ② 修改main.xml 布局，添加 UI元素标准体重!" android:textSize="25px" android:layout_x="65px" android:layout_y="21px"> packagepackagepackagepackage zyf.Ex10_UI; importimportimportimport android.app.Activity; importimportimportimport android.os.Bundle; publicpublicpublicpublic classclassclassclass BMIActivity extendsextendsextendsextends Activity { /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { supersupersupersuper.onCreate(savedInstanceState); } }

-----------------------------------Android编程基础 17 ⑥ 修改 BMIActivity.java内容 packagepackagepackagepackage zyf.Ex10_UI; /* import 相关class */ importimportimportimport java.text.DecimalFormat; importimportimportimport java.text.NumberFormat; importimportimportimport android.app.Activity; importimportimportimport android.os.Bundle; importimportimportimport android.widget.TextView; publicpublicpublicpublic classclassclassclass BMIActivity extendsextendsextendsextends Activity { /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { supersupersupersuper.onCreate(savedInstanceState); /* 加载main.xml Layout */ setContentView(R.layout.mylayout); /* 取得Intent 中的Bundle 对象 */ Bundle bunde = thisthisthisthis.getIntent().getExtras(); /* 取得Bundle 对象中的数据 */ String sex = bunde.getString("sex"); doubledoubledoubledouble height = bunde.getDouble("height"); /* 判断性别 */ String sexText = ""; ifififif (sex.equals("M")) { sexText = "男性"; } elseelseelseelse { sexText = "女性"; } /* 取得标准体重 */ String weight = thisthisthisthis.getWeight(sex, height); /* 设置输出文字 */ TextView tv1 = (TextView) findViewById(R.id.text1); tv1.setText("你是一位" + sexText + "\n你的身高是" + height + "厘米\n你的标准体重是"+ weight + "公斤"); } /* 四舍五入的method */ privateprivateprivateprivate String format(doubledoubledoubledouble num) { NumberFormat formatter = newnewnewnew DecimalFormat("0.00"); String s = formatter.format(num); returnreturnreturnreturn s; } -----------------------------------Android编程基础 18 ⑦ 修改mainActivity.java内容 /* 以findViewById()取得Button 对象，并添加onClickListener */ privateprivateprivateprivate String getWeight(String sex, doubledoubledoubledouble height) { String weight = ""; ifififif (sex.equals("M")) { weight = format((height - 80) * 0.7); } elseelseelseelse { weight = format((height - 70) * 0.6); } returnreturnreturnreturn weight; } } packagepackagepackagepackage zyf.Ex10_UI; /* import 相关class */ importimportimportimport android.app.Activity; importimportimportimport android.content.Intent; importimportimportimport android.os.Bundle; importimportimportimport android.view.View; importimportimportimport android.widget.Button; importimportimportimport android.widget.EditText; importimportimportimport android.widget.RadioButton; publicpublicpublicpublic classclassclassclass Ex10_UI extendsextendsextendsextends Activity { /** Called when the activity is first created. */ @Override publicpublicpublicpublic voidvoidvoidvoid onCreate(Bundle savedInstanceState) { supersupersupersuper.onCreate(savedInstanceState); /* 载入main.xml Layout */ setContentView(R.layout.main); /* 以findViewById()取得Button 对象，并添加onClickListener */ Button ok = (Button) findViewById(R.id.button_OK); ok.setOnClickListener(newnewnewnew Button.OnClickListener() { publicpublicpublicpublic voidvoidvoidvoid onClick(View v) { /* 取得输入的身高 */ EditText et = (EditText) findViewById(R.id.height_Edit); doubledoubledoubledouble height = Double.parseDouble(et.getText().toString()); /* 取得选择的性别 */ String sex = ""; RadioButton rb1 = (RadioButton) findViewById(R.id.Sex_Man); ifififif (rb1.isChecked()) { sex = "M"; } elseelseelseelse { -----------------------------------Android编程基础 19 ⑧ 结果： sex = "F"; } /*

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Android开发七--基础UI编程2

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