react native 怎么调用java的接口 react-native怎么调用android原生

\u7528react native\u600e\u4e48\u8c03\u7528\u540e\u53f0\u63a5\u53e3

\u6211\u7406\u89e3\u7684\u662f\uff0creactjs\u662f\u7ed9\u4e86\u524d\u7aef\u5f00\u53d1\u4eba\u5458\u4e00\u4e2a\u4f7f\u7528js\u5f00\u53d1\u539f\u751f\u5e94\u7528\u7684\u673a\u4f1a\uff0c\u63d0\u4f9b\u4e86\u4e00\u5957\u5404\u4e2a\u5e73\u53f0\u901a\u7528\u7684\u8bed\u6cd5\u7ed3\u6784api\u7b49\u7b49\uff0c\u4f7f\u524d\u7aef\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4f7f\u7528\u73b0\u6709\u7684\u77e5\u8bc6\u8fdb\u884c\u79fb\u52a8\u5e73\u53f0APP\u7684\u5f00\u53d1\uff0c\u662f\u4f7f\u7528\u76f8\u540c\u7684\u77e5\u8bc6\u8fdb\u884c \u4e0d\u540c\u5e73\u53f0\u7684\u5f00\u53d1\uff0c\u4e5f\u5c31\u662f\u4f60\u8981\u4e3aios\u548candroid\u540c

public class RnTest extends ReactContextBaseJavaModule {
public RnTest(ReactApplicationContext reactContext) {
super(reactContext);
}
// ReactContextBaseJavaModule\u8981\u6c42\u6d3e\u751f\u7c7b\u5b9e\u73b0getName\u65b9\u6cd5\u3002\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32
// \u8fd9\u4e2a\u5b57\u7b26\u4e32\u7528\u4e8e\u5728JavaScript\u7aef\u6807\u8bb0\u8fd9\u4e2a\u539f\u751f\u6a21\u5757
@Override
public String getName() {
return "ToastByAndroid";
}
// \u83b7\u53d6\u5e94\u7528\u5305\u540d
// \u8981\u5bfc\u51fa\u4e00\u4e2a\u65b9\u6cd5\u7ed9JavaScript\u4f7f\u7528\uff0cJava\u65b9\u6cd5\u9700\u8981\u4f7f\u7528\u6ce8\u89e3@ReactMethod
@ReactMethod
public void getPackageName() {
String name = getReactApplicationContext().getPackageName();
Toast.makeText(getReactApplicationContext(),name,Toast.LENGTH_LONG).show();
}
}

public class RnTest extends ReactContextBaseJavaModule {
public RnTest(ReactApplicationContext reactContext) {
super(reactContext);
}
// ReactContextBaseJavaModule要求派生类实现getName方法。这个函数用于返回一个字符串
// 这个字符串用于在JavaScript端标记这个原生模块
@Override
public String getName() {
return "ToastByAndroid";
}
// 获取应用包名
// 要导出一个方法给JavaScript使用，Java方法需要使用注解@ReactMethod
@ReactMethod
public void getPackageName() {
String name = getReactApplicationContext().getPackageName();
Toast.makeText(getReactApplicationContext(),name,Toast.LENGTH_LONG).show();

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