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  • 文件预览工具类

    import android.content.ActivityNotFoundException;
    import android.content.Context;
    import android.content.Intent;
    import android.net.Uri;
    import android.widget.Toast;
    
    import com.xuehu365.xuehu.R;
    import com.xuehu365.xuehu.ui.widget.AlertDialog;
    
    import java.io.File;
    
    /**
     * Created by David on 2016/8/17.
     */
    public class FileOpenIntentHelp {
    
        //android获取一个用于打开文件的intent
        public static Intent getFileIntent(String param) {
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "*/*");
            return intent;
        }
    
        //android获取一个用于打开Word文件的intent
        public static Intent getWordFileIntent(String param) {
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "application/msword");
            return intent;
        }
    
        //android获取一个用于打开文本文件的intent
        public static Intent getTextFileIntent(String param) {
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "text/plain");
            return intent;
        }
    
        //android获取一个用于打开PDF文件的intent
        public static Intent getPdfFileIntent(String param) {
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "application/pdf");
            return intent;
        }
    
        //Android获取一个用于打开PPT文件的intent
        public static Intent getPptFileIntent(String param) {
    
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
            return intent;
        }
    
        //Android获取一个用于打开Excel文件的intent
        public static Intent getExcelFileIntent(String param) {
    
            Intent intent = new Intent("android.intent.action.VIEW");
            intent.addCategory("android.intent.category.DEFAULT");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = Uri.fromFile(new File(param));
            intent.setDataAndType(uri, "application/vnd.ms-excel");
            return intent;
        }
    
        /**
         * 使用intent打开文件
         *
         * @param fileFullName
         * @param fileExt
         * @param context
         */
        public static void openFile(String fileFullName, String fileExt, Context context) {
            try {
                if (FileMIMEHelp.checkEndsWithInStringArray(fileFullName, context.getResources().getStringArray(R.array.fileEndingPdf))) {
                    Intent fileIntent = FileOpenIntentHelp.getPdfFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                } else if (FileMIMEHelp.checkEndsWithInStringArray(fileFullName, context.getResources().getStringArray(R.array.fileEndingText))) {
                    Intent fileIntent = FileOpenIntentHelp.getTextFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                } else if (FileMIMEHelp.checkEndsWithInStringArray(fileFullName, context.getResources().getStringArray(R.array.fileEndingPPT))) {
                    Intent fileIntent = FileOpenIntentHelp.getPptFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                } else if (FileMIMEHelp.checkEndsWithInStringArray(fileFullName, context.getResources().getStringArray(R.array.fileEndingWord))) {
                    Intent fileIntent = FileOpenIntentHelp.getWordFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                } else if (FileMIMEHelp.checkEndsWithInStringArray(fileFullName, context.getResources().getStringArray(R.array.fileEndingExcel))) {
                    Intent fileIntent = FileOpenIntentHelp.getExcelFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                } else {
                    Intent fileIntent = FileOpenIntentHelp.getFileIntent(fileFullName);
                    context.startActivity(fileIntent);
                }
    
    
            } catch (NullPointerException e) {
                new AlertDialog(context).builder().setTitle("文件损坏").setMsg("文件不存在或文件已损坏!").setPositiveButton("好", null).show();
            } catch (ActivityNotFoundException e) {
                Toast.makeText(context, "找不到合适的应用打开该文件。请安装合适应用", Toast.LENGTH_SHORT).show();
            } catch (Exception e) {
                Toast.makeText(context, "打开文件发生错误", Toast.LENGTH_SHORT).show();
            }
        }
    
        /**
         * 文件是否存在
         *
         * @param fileFullName
         * @return
         */
        public static boolean isFileExist(String fileFullName) {
            boolean b = false;
            try {
                File file = new File(fileFullName);
                if (file.exists()) {
                    b = true;
                }
            } catch (Exception e) {
                b = false;
            }
            return b;
        }
    }
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  • 原文地址:https://www.cnblogs.com/anni-qianqian/p/6349798.html
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