StudyJams-第08课_多语言支持
1 logcat：
1.1 Log.v(tag, message);//Log.d、Log.i、Log.w、Log.e
2 垂直的线性布局过长，无法显示全部数据。使其可以滑动。
2.1 使用ScrollView
3 新控件学习
3.1 CheackBox
3.1.1 cheakBox.isChecked()
3.2 EditText
3.2.1 editText.getText().toString()
4 Intent
4.1 强大的东东，Activity和Activity之间的纽带啊！！！
4.2 还可以携带数据，你怕不怕？
5 多语言支持
5.1 中文（中國）：values-zh-rCN
6 style的用法
6.1 一处编写，多处调用
6.2 一处修改，多处改变
7
8 show code：
8.1 MainActivity.java:
package wang.relish.ordercoffee;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.CheckBox;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
AutoCompleteTextView etName;
TextView tvQuantity;
TextView tvPrice;
CheckBox cbCream;
CheckBox cbChocolate;
int unitPrice = 5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etName = (AutoCompleteTextView) findViewById(R.id.etName);
tvQuantity = (TextView) findViewById(R.id.tvQuantity);
tvPrice = (TextView) findViewById(R.id.tvOrderSummary);
cbCream = (CheckBox) findViewById(R.id.cbCream);
cbChocolate = (CheckBox) findViewById(R.id.cbChocolate);
}
public void increase(View v) {
String currentQuantityStr = tvQuantity.getText().toString();
int currentQuantity = Integer.parseInt(currentQuantityStr);
tvQuantity.setText(String.valueOf(currentQuantity + 1));
}
public void decrease(View v) {
String currentQuantityStr = tvQuantity.getText().toString();
int currentQuantity = Integer.parseInt(currentQuantityStr);
if (currentQuantity == 0) {
return;
}
tvQuantity.setText(String.valueOf("$" + (currentQuantity - 1)));
}
public void submitOrder(View v) {
String name = etName.getText().toString();
boolean addCream = cbCream.isChecked();
boolean addChocolate = cbChocolate.isChecked();
int quantity = Integer.parseInt(tvQuantity.getText().toString());
int total = quantity * unitPrice + (addCream ? 1 : 0) + (addChocolate ? 2 : 0);
String message = makeupOrderSummary(name, addCream, addChocolate, quantity, total);
Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("mailto:"));
intent.putExtra(Intent.EXTRA_SUBJECT, "Just Java order for " + name);
intent.putExtra(Intent.EXTRA_TEXT, message);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
tvPrice.setText(message);
}
private String makeupOrderSummary(String name, boolean addCream, boolean addChocolate, int quantity, int total) {
String s = getResources().getString(R.string.order_summary_name, name);
s += "\n" + getResources().getString(R.string.order_summary_whipped_cream, addCream+"");
s += "\n"+getResources().getString(R.string.order_summary_chocolate, addChocolate+"");
s += "\n"+getResources().getString(R.string.order_summary_quantity,quantity);
s += "\n"+getResources().getString(R.string.order_summary_price,total);
s += "\n"+getResources().getString(R.string.thank_you);
return s;
}
}8.2 activity_main.xml
<ScrollView 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"
tools:context="wang.relish.ordercoffee.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<AutoCompleteTextView
android:id="@+id/etName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:hint="@string/name"
android:inputType="textCapWords" />
<TextView
style="@style/HeaderTextStyle"
android:text="@string/toppings" />
<CheckBox
android:id="@+id/cbCream"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginEnd="24dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="24dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="@string/whipped_cream" />
<CheckBox
android:id="@+id/cbChocolate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginEnd="24dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="24dp"
android:layout_marginStart="16dp"
android:text="@string/chocolate" />
<TextView
style="@style/HeaderTextStyle"
android:text="@string/quantity" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:orientation="horizontal">
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:onClick="decrease"
android:text="-" />
<TextView
android:id="@+id/tvQuantity"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginBottom="16dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:gravity="center_vertical"
android:text="@string/initial_quantity_value"
android:textSize="24sp" />
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginBottom="16dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:onClick="increase"
android:text="+" />
LinearLayout>
<TextView
style="@style/HeaderTextStyle"
android:text="@string/order_summary" />
<TextView
android:id="@+id/tvOrderSummary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="$0" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:onClick="submitOrder"
android:text="@string/order" />
LinearLayout>
ScrollView>8.3 strings.xml
"http://schemas.android.com/tools">
<string name="app_name">Just Javastring>
<string name="name">Namestring>
<string name="toppings">Toppingsstring>
<string name="whipped_cream">Whipped creamstring>
<string name="chocolate">Chocolatestring>
<string name="quantity">Quantitystring>
<string name="initial_quantity_value">2string>
<string name="order">Orderstring>
<string name="order_summary_name">Name:"Amy" id="name">%s string>
<string name="order_summary_whipped_cream">Add whipped cream? "true" id="addWhippedCream">%s string>
<string name="order_summary_chocolate">Add chocolate? "true" id="addWhippedCream">%s string>
<string name="order_summary_quantity">Quantity: "2" id="quantity">%s string>
<string name="order_summary_price">Total: "$10" id="price">%d string>
<string name="thank_you">Thank you!string>
<string name="order_summary_email_subject">Just Java order for "Amy" id="name">%s string>
<string name="order_summary">Order Summarystring>
复制代码
values-zh-rCN/strings.xml
"http://schemas.android.com/tools">
<string name="app_name">点咖啡string>
<string name="name">姓名string>
<string name="toppings">附加string>
<string name="whipped_cream">奶油string>
<string name="chocolate">巧克力string>
<string name="quantity">数量string>
<string name="initial_quantity_value">2string>
<string name="order">下单string>
<string name="order_summary_name">姓名:"艾米" id="name">%s string>
<string name="order_summary_whipped_cream">加奶油吗？ "加" id="addWhippedCream">%s string>
<string name="order_summary_chocolate">加巧克力吗? "加" id="addWhippedCream">%s string>
<string name="order_summary_quantity">数量: "2" id="quantity">%d string>
<string name="order_summary_price">总计: "$10" id="price">%d string>
<string name="thank_you">谢谢品尝!string>
<string name="order_summary_email_subject">"Amy" id="name">%s 的点咖啡订单string>
<string name="order_summary">订单总计string>
8.4 styles.xml
-- Base application theme. -->
9 show 截屏：
9.1 中文界面：
9.2 语言切换：
9.3 英文界面：
