04项目的目录结构分析与资源引用

Posted 2020-09-28

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普通字符串资源：

 

布局资源：

 

案例:

main.xml:

<TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="240dp"

        android:text="加油吧！少年！"

        />

    <Button

        android:id="@+id/button1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="@string/msg"

        android:onClick="test"

        />

R.java:

public final class R {

    public static final class attr {

    }

    public static final class drawable {

        public static final int ic_launcher=0x7f020000;

    }

    public static final class id {

        public static final int button1=0x7f050001;

        public static final int textView1=0x7f050000;

    }

    public static final class layout {

        public static final int main=0x7f030000;

    }

    public static final class string {

        public static final int app_name=0x7f040000;

        public static final int hello=0x7f040001;

        public static final int msg=0x7f040002;

    }

}

 

Strings.xml:

<resources>

    <string name="app_name">ONEAndroid</string>

    <string name="hello">Hello World, ONEAndroidActivity!</string>

    <string name="msg">welcome,weini!</string>

</resources>

 

ONEAndroidActivity.java:

public void test(View view){

     TextView textView1=(TextView) findViewById (R.id.textView1);

     textView1.setText("The greatest test of courage on earth is to bear defeat without losing heart\\n世界上对勇气的最大考验是忍受失败而不丧失信心。");

     Toast.makeText(ONEAndroidActivity.this, "点击button",Toast.LENGTH_SHORT).show();

}

 

运行结果：

点击按钮前：

 

  点击按后：

 

中英文时候的选择：

 

 

图示：