android 中 java 和 javascript 通过webview 交互

最新推荐文章于 2025-09-13 09:50:31 发布

转载最新推荐文章于 2025-09-13 09:50:31 发布 · 87 阅读

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原文链接：https://my.oschina.net/oldfeel/blog/106195

文章标签：

#移动开发 #java #javascript #ViewUI

2019独角兽企业重金招聘Python工程师标准>>>

package com.example.test_android;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;

@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {

	private WebView wv;
	private Button btn;
	private int count;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		wv = (WebView) findViewById(R.id.webView);
		wv.getSettings().setJavaScriptEnabled(true);
		wv.addJavascriptInterface(this, "oldfeel");
		wv.loadUrl("http://192.168.0.228:8080/web/index.jsp");
		btn = (Button) findViewById(R.id.btn);
		btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				apiJS();
			}
		});
	}

	public void apiJS() {
		wv.loadUrl("javascript:testJS()"); // 调用js中的testJS()方法
	}

	// 在js中调用window.oldfeel.apiJava()执行此方法
	public void apiJava() {
		// btn.setText("java" + count++); // 直接执行此代码的话view不刷新，要调用handler才会刷新
		handler.post(runnable);
	}

	Handler handler = new Handler();
	Runnable runnable = new Runnable() {

		@Override
		public void run() {
			btn.setText("java" + count++);
		}
	};
}

package com.example.test_android;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;

@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {

	private WebView wv;
	private Button btn;
	private int count;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		wv = (WebView) findViewById(R.id.webView);
		wv.getSettings().setJavaScriptEnabled(true);
		wv.addJavascriptInterface(this, "oldfeel");
		wv.loadUrl("http://192.168.0.228:8080/web/index.jsp");
		btn = (Button) findViewById(R.id.btn);
		btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				apiJS();
			}
		});
	}

	public void apiJS() {
		wv.loadUrl("javascript:testJS()"); // 调用js中的testJS()方法
	}

	// 在js中调用window.oldfeel.apiJava()执行此方法
	public void apiJava() {
		// btn.setText("java" + count++); // 直接执行此代码的话view不刷新，要调用handler才会刷新
		handler.post(runnable);
	}

	Handler handler = new Handler();
	Runnable runnable = new Runnable() {

		@Override
		public void run() {
			btn.setText("java" + count++);
		}
	};
}

<RelativeLayout 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=".MainActivity" >

    <Button
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/btn" />

</RelativeLayout>

转载于:https://my.oschina.net/oldfeel/blog/106195