Android基础环境搭建

 

1.安装JDK

从官网下载JDK安装，

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

我选择的如上图红色，为jdk1.8.0_45。

 

安装好JDK之后，会提示安装JRE，请保持安装在同一目录：如均在"Java"目录下

 

2.配置环境变量

1. 新建JAVA_HOME：选择jdk的安装路径，如K:Javajdk1.8.0_45

   

2. Path中增加：%JAVA_HOME%in;%JAVA_HOME%jrein;

   

3. 新建CLASSPATH：.;%JAVA_HOME%libdt.jar;%JAVA_HOME%lib ools.jar;

   

4. 验证

   

   

    

   

   

    

   java和javac命令都通过，则说明配置好了！

    

3.下载ADT

由于不知怎么找到，从百度云盘搜索了一个。

 

4.实用工具

Ctr +shift+O 自动添加包

Ctr+/        注释代码

Ctr+Shit+F    自动格式化代码

注：如果快捷键失效，请关闭搜狗输入法的全局热键。

    

 

由于很久没有打开过开发环境了：

居然不知多了一个fragment.xml的配置，调试的时候总是提示有问题：

在网上找到一个经验：

 

1. 将带有fragment_***.xml的文件删除；
2. 打开对应的Activity，将ActionBarActivity替换为Activity；
3. 去除PlaceholderFragment整个类

 

修改之前：

1. public class TestActivity extends ActionBarActivity {
2.  
3.    @Override
4.    protected void onCreate(Bundle savedInstanceState) {
5.       super.onCreate(savedInstanceState);
6.       setContentView(R.layout.activity_test);
7.  
8.       if (savedInstanceState == null) {
9.          getSupportFragmentManager().beginTransaction()
10.                .add(R.id.container, new PlaceholderFragment()).commit();
11.       }
12.    }
13.  
14.    @Override
15.    public boolean onCreateOptionsMenu(Menu menu) {
16.  
17.       // Inflate the menu; this adds items to the action bar if it is present.
18.       getMenuInflater().inflate(R.menu.test, menu);
19.       return true;
20.    }
21.  
22.    @Override
23.    public boolean onOptionsItemSelected(MenuItem item) {
24.       // Handle action bar item clicks here. The action bar will
25.       // automatically handle clicks on the Home/Up button, so long
26.       // as you specify a parent activity in AndroidManifest.xml.
27.       int id = item.getItemId();
28.       if (id == R.id.action_settings) {
29.          return true;
30.       }
31.       return super.onOptionsItemSelected(item);
32.    }
33.  
34.    /**
35.     * A placeholder fragment containing a simple view.
36.     */
37.    public static class PlaceholderFragment extends Fragment {
38.  
39.       public PlaceholderFragment() {
40.       }
41.  
42.       @Override
43.       public View onCreateView(LayoutInflater inflater, ViewGroup container,
44.             Bundle savedInstanceState) {
45.          View rootView = inflater.inflate(R.layout.fragment_test, container,
46.                false);
47.          return rootView;
48.       }
49.    }
50. }

修改之后：

1. public class TestActivity extends Activity {
2.  
3.    @Override
4.    protected void onCreate(Bundle savedInstanceState) {
5.       super.onCreate(savedInstanceState);
6.       setContentView(R.layout.activity_test);
7.    }
8.  
9.    @Override
10.    public boolean onCreateOptionsMenu(Menu menu) {
11.  
12.       // Inflate the menu; this adds items to the action bar if it is present.
13.       getMenuInflater().inflate(R.menu.test, menu);
14.       return true;
15.    }
16.  
17.    @Override
18.    public boolean onOptionsItemSelected(MenuItem item) {
19.       // Handle action bar item clicks here. The action bar will
20.       // automatically handle clicks on the Home/Up button, so long
21.       // as you specify a parent activity in AndroidManifest.xml.
22.       int id = item.getItemId();
23.       if (id == R.id.action_settings) {
24.          return true;
25.       }
26.       return super.onOptionsItemSelected(item);
27.    }
28. }