android安卓 webview upload上傳圖片

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ClipData;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.TextView;

import com.zjsos.tzlawenforcement.util.SPUtils;


public class WebViewActivity extends AppCompatActivity {


    private ValueCallback<Uri> uploadMessage;
    private ValueCallback<Uri[]> uploadMessageAboveL;
    private final static int FILE_CHOOSER_RESULT_CODE = 10000;

    private Toolbar toolbar;
    private WebView webview;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);

        webview = (WebView) findViewById(R.id.web_view);

        toolbar=findViewById(R.id.toolbar);
        textView=findViewById(R.id.titile);

        WebSettings settings = webview.getSettings();
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);

        settings.setJavaScriptEnabled(true);

        settings.setAllowContentAccess(true);
        settings.setDatabaseEnabled(true);
        settings.setSavePassword(false);
        settings.setSaveFormData(false);


        settings.setSupportZoom(false);
        // 自適應屏幕大小
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);


        settings.setAppCacheEnabled(true);
        settings.setDomStorageEnabled(true);
        settings.setAllowFileAccess(true);
        settings.setAppCacheMaxSize(1024 * 1024 * 8);
        settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
        settings.setSupportMultipleWindows(true);


        settings.setBlockNetworkImage(false);//解決圖片不顯示
        // 1.設置WebChromeClient，重寫文件上傳回調
        webview.setWebChromeClient(new WebChromeClient() {

            // For Android < 3.0
            public void openFileChooser(ValueCallback<Uri> 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<Uri> valueCallback, String acceptType, String capture) {
                uploadMessage = valueCallback;
                openImageChooserActivity();
            }

            // For Android >= 5.0
            @Override
            public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
                uploadMessageAboveL = filePathCallback;
                openImageChooserActivity();
                return true;
            }
        });

        initToolbar("記分管理");

        webview.loadUrl("/text.html");
    }

    // 2.回調方法觸發本地選擇文件
    private void openImageChooserActivity() {
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
//        i.setType("image/*");//圖片上傳
//        i.setType("file/*");//文件上傳
        i.setType("*/*");//文件上傳
        startActivityForResult(Intent.createChooser(i, "Image Chooser"), FILE_CHOOSER_RESULT_CODE);
    }

    // 3.選擇圖片後處理
    @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();
            // 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;
            }
        } else {
            //這裏uploadMessage跟uploadMessageAboveL在不同系統版本下分別持有了
            //WebView對象，在用戶取消文件選擇器的情況下，需給onReceiveValue傳null返回值
            //否則WebView在未收到返回值的情況下，無法進行任何操作，文件選擇器會失效
            if (uploadMessage != null) {
                uploadMessage.onReceiveValue(null);
                uploadMessage = null;
            } else if (uploadMessageAboveL != null) {
                uploadMessageAboveL.onReceiveValue(null);
                uploadMessageAboveL = null;
            }
        }
    }

    // 4. 選擇內容回調到Html頁面
    @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;
    }


    private void initToolbar(String title) {

        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        toolbar.setNavigationOnClickListener(v -> {
            if (webview.canGoBack())
                webview.goBack();

            else
                removeFragment();

        });
        textView.setText(title);
    }



    public void removeFragment() {
        if (getSupportFragmentManager().getBackStackEntryCount() > 1) {
            getSupportFragmentManager().popBackStack();
        } else if (getSupportFragmentManager().getBackStackEntryCount() == 1) {
            getSupportFragmentManager().popBackStack();
            if (Build.VERSION.SDK_INT >= 21) {
                getWindow().setStatusBarColor(ContextCompat.getColor(this, com.jaydenxiao.common.R.color.status_main_color));
                getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
//                InputMethodManager imm = (InputMethodManager) this.getSystemService(Context.INPUT_METHOD_SERVICE);
//                boolean a = imm.isActive();
//                if (imm.isActive())
//                Log.d("", "");
            }
        } else {
            finish();
        }
    }
}