hello，又是我鑫鑫
这次给大家带来的是支持文件上传，图片下载，以及网页标题进步显示的web项目
还是挺好用的，我的工程中也运用了这个项目
以下是具体的效果
文件上传
。
图片下载
获取标题及加载进度
MainActivity
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ClipData;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.webkit.DownloadListener;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.WebView.xinxin.MainActivity;
import com.WebView.xinxin.DownPicUtil;
import com.WebView.xinxin.R;
import java.io.FileNotFoundException;
public class MainActivity extends Activity {
//声明相应ID
private WebView webView;
private Context context;
private TextView tvTitle;
private TextView tvProgress;
//这里定义所需要的变量
private ValueCallback
private ValueCallback
private final static int FILE_CHOOSER_RESULT_CODE = 10000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);//绑定页面ID
getActionBar().hide();
//去除导航栏
Window navigation = getWindow();
navigation.getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
context= this;
getActionBar().hide();//去除标题栏
//获取标题显示进度显示的布局ID
final LinearLayout top = findViewById(R.id.top);
//获得其他控件
tvTitle = (TextView) findViewById(R.id.tv_title);
// tvStart = (TextView) findViewById(R.id.tv_start);
tvProgress = (TextView) findViewById(R.id.tv_progress);
// tvEnd = (TextView) findViewById(R.id.tv_end);
webView = (WebView) findViewById(R.id.web);//绑定网页布局ID
WebSettings settings = webView.getSettings();//web一些设置
settings.setJavaScriptEnabled(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);
// 当网页需要保存数时据,设置下面属性
settings.setDomStorageEnabled(true);
//设置页面自适应 窗口大小改变后页面自适应改变
settings.setUseWideViewPort(true);//设置为使用webview推荐的窗口，主要是为了配合下一个属性
settings.setLoadWithOverviewMode(true);//设置网页自适应屏幕大小，该属性必须和上一属性配合使用
// webSettings.setGeolocationEnabled(true); //启用还H5的地理定位服务
// 设置是否允许webview使用缩放的功能
settings.setSupportZoom(true);
settings.setBuiltInZoomControls(true);
settings.setDisplayZoomControls(false); //隐藏webview缩放按钮
settings.setAllowFileAccess(true);//支持上传文件
// 提高网页渲染的优先级
settings.setRenderPriority(WebSettings.RenderPriority.HIGH);
//优先使用缓存加载
settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
// 加载指定网页
//打开外部应用网页
//webView.loadUrl("https://qm.qq.com/cgi-bin/qm/qr?k=EWYf-_SRrmPF-f4xyYKQfNklEcHMsjVR&noverify=0");
//普通网页
webView.loadUrl("https://baidu.com");
webView.setWebViewClient(new WebViewClient(){
//跳转第三方应用，缺少判断是否有该APP，这里就不掩饰了，不然会闪退。
/* @Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (!(url.startsWith("http") || url.startsWith("https"))) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
return true;
}
view.loadUrl(url);
return true;
}*/
//显示搜索功能，跳转浏览器搜索
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request)
{
if(request.hasGesture()){
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(request.getUrl().toString()));
startActivity(browserIntent);
}else {
webView.loadUrl(request.getUrl().toString());
}
return true;
}
});
webView.setWebChromeClient(new WebChromeClient() {
//文件上传
// For Android < 3.0
public void openFileChooser(ValueCallback
uploadMessage = valueCallback;
openImageChooserActivity();
}
// For Android >= 3.0
public void openFileChooser(ValueCallback valueCallback, String acceptType) {
uploadMessage = valueCallback;
openImageChooserActivity();
}
//For Android >= 4.1
public void openFileChooser(ValueCallback
uploadMessage = valueCallback;
openImageChooserActivity();
}
// For Android >= 5.0
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback
uploadMessageAboveL = filePathCallback;
openImageChooserActivity();
return true;
}
//获取网站标题
@Override
public void onReceivedTitle(WebView view, String title) {
tvTitle.setText(title);
}
//进度显示
@Override
public void onProgressChanged(WebView view, int newProgress) {
if (newProgress < 100) {
tvProgress.setText(newProgress + "%");
} else {
tvProgress.setText("100%");
top.setVisibility(View.GONE);
}
}
});
//设置下载监听
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(final String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("信息提示")//设置对话框标题
.setIcon(R.drawable.ic_launcher)
.setMessage("下载将跳转浏览器，是否选择？")
.setPositiveButton("是", new DialogInterface.OnClickListener() {//添加确定按钮
@Override
public void onClick(DialogInterface dialog, int which) {//确定按钮的响应事件
Uri uri = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
}).setNegativeButton("否", new DialogInterface.OnClickListener() {//添加返回按钮
@Override
public void onClick(DialogInterface dialog, int which) {//响应事件
}
}).show();//在按键响应事件中显示此对话框
}
});
// 长按点击事件
webView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
final WebView.HitTestResult hitTestResult = webView.getHitTestResult();
// 如果是图片类型或者是带有图片链接的类型
if(hitTestResult.getType()== WebView.HitTestResult.IMAGE_TYPE||
hitTestResult.getType()== WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE){
// 弹出保存图片的对话框
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("提示");
builder.setMessage("保存图片到本地");
builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
String url = hitTestResult.getExtra();
// 下载图片到本地
DownPicUtil.downPic(url, new DownPicUtil.DownFinishListener(){
@Override
public void getDownPath(String s) {
Toast.makeText(context,"下载完成",Toast.LENGTH_LONG).show();
Message msg = Message.obtain();
msg.obj=s;
handler.sendMessage(msg);
}
});
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
// 自动dismiss
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
return true;
}
});
}
/*文件上传*/
//这里定义具体上传函数
private void openImageChooserActivity() {
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
startActivityForResult(Intent.createChooser(i, "选择文件"), FILE_CHOOSER_RESULT_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == FILE_CHOOSER_RESULT_CODE) {
if (null == uploadMessage && null == uploadMessageAboveL) return;
Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
if (uploadMessageAboveL != null) {
onActivityResultAboveL(requestCode, resultCode, data);
} else if (uploadMessage != null) {
uploadMessage.onReceiveValue(result);
uploadMessage = null;
}
}
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void onActivityResultAboveL(int requestCode, int resultCode, Intent intent) {
if (requestCode != FILE_CHOOSER_RESULT_CODE || uploadMessageAboveL == null)
return;
Uri[] results = null;
if (resultCode == Activity.RESULT_OK) {
if (intent != null) {
String dataString = intent.getDataString();
ClipData clipData = intent.getClipData();
if (clipData != null) {
results = new Uri[clipData.getItemCount()];
for (int i = 0; i < clipData.getItemCount(); i++) {
ClipData.Item item = clipData.getItemAt(i);
results[i] = item.getUri();
}
}
if (dataString != null)
results = new Uri[]{Uri.parse(dataString)};
}
}
uploadMessageAboveL.onReceiveValue(results);
uploadMessageAboveL = null;
}
/*图片文件的下载*/
Handler handler =new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
String picFile = (String) msg.obj;
String[] split = picFile.split("/");
String fileName = split[split.length-1];
try {
MediaStore.Images.Media.insertImage(getApplicationContext().getContentResolver(), picFile, fileName, null);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// 最后通知图库更新
getApplicationContext().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + picFile)));
//MyToast("图片保存图库成功", 1100);//这个是自定义toast，联动下面的自定义toast，具体代码请在评论区询问
Toast.makeText(MainActivity.this, "图片保存成功", Toast.LENGTH_LONG).show();//这是普通的toast。
}
};
/*自定义Toast*/
//具体见我自定义Toast的文章,这里就不写进去了
/*
public void MyToast(String str, int showTime) {
View view= LayoutInflater.from(this).inflate(R.layout.view_toast_custom,null);
TextView tv_msg = (TextView) view.findViewById(R.id.tvToast);
tv_msg.setText(str);
Toast toast = new Toast(this);
toast.setGravity(Gravity.BOTTOM|Gravity.CENTER, 0, 20);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(view);
toast.show();
}*/
/*返回键的监听*/
// 监听返回键返回网页的上一层
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()){
if(webView != null){
webView.goBack();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
}
activity_main
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" android:background="#FFFFFFFF"> android:id="@+id/top" android:layout_width="match_parent" android:layout_height="95dp" android:orientation="vertical" android:layout_marginTop="15dp" android:layout_weight="1.0" android:layout_marginBottom="3dp" android:background="@drawable/fill_stroke"> android:id="@+id/tv_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="获取标题" android:gravity="center" android:textStyle="bold" android:textColor="#FF000000"/> android:layout_height="wrap_content" android:layout_width="match_parent"> android:id="@+id/tv_progress" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="获取加载进度" android:layout_weight="1.0" android:textStyle="bold" android:textColor="#FF000000" android:gravity="center"/> android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" android:layout_weight="1.0"> android:id="@+id/web" android:layout_width="match_parent" android:layout_height="match_parent"/> 图片下载工具 import android.os.*; import android.util.*; import java.io.*; import java.net.*; public class DownPicUtil { public static void downPic(String url,DownFinishListener downFinishListener){ // 获取存储卡的目录 String filePath = Environment.getExternalStorageDirectory().getPath(); File file = new File(filePath+File.separator+"Minecraft服务器管理/"); if(!file.exists()){ file.mkdir(); } loadPic(file.getPath(),url,downFinishListener); } private static void loadPic(final String filePath, final String url, final DownFinishListener downFinishListener) { Log.e("下载图片的url",url); new AsyncTask String fileName; InputStream is; OutputStream out; @Override protected String doInBackground(Void... voids) { // 下载文件的名称 String[] split = url.split("/"); String newString = split[split.length - 1]; fileName =newString.substring(newString.length()-20,newString.length()-1) ; // 创建目标文件,不是文件夹 File picFile = new File(filePath + File.separator + fileName); if(picFile.exists()){ return picFile.getPath(); } try { URL picUrl = new URL(url); //通过图片的链接打开输入流 is = picUrl.openStream(); if(is==null){ return null; } out = new FileOutputStream(picFile); byte[] b=new byte[1024]; int end ; while ((end=is.read(b))!=-1){ out.write(b,0,end); } Log.e("OK??","----------"); if(is!=null){ is.close(); } if(out!=null){ out.close(); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return picFile.getPath(); } @Override protected void onPostExecute(String s) { super.onPostExecute(s); if(s!=null){ downFinishListener.getDownPath(s); } } }.execute(); } //下载完成回调的接口 public interface DownFinishListener{ void getDownPath(String s); } } 别忘了在AndroidManifest.xml中添加相应的权限 文章到这也就结束了，如果有啥问题，请在评论区中提出 代码开源之后会发在评论区的 那我们下篇文章见 精彩链接
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