【Android】打开/读取文件的方法

来源：互联网发布：蒙文软件下载手机软件编辑：程序博客网时间：2024/06/07 16:54
public class IntentBuilder {    public static Intent openFile(String filePath) {        File file = new File(filePath);        if (!file.exists())            return null;      /* 取得扩展名 */        String end = file.getName().substring(file.getName().lastIndexOf(".") + 1, file.getName().length())                .toLowerCase();      /* 依扩展名的类型决定MimeType */        if (end.equals("m4a") || end.equals("mp3") || end.equals("mid") || end.equals("xmf") || end.equals("ogg")                || end.equals("wav")) {            return getMusicFileIntent(filePath);        } else if (end.equals("3gp") || end.equals("mp4")) {            return getVideoFileIntent(filePath);        } else if (end.equals("jpg") || end.equals("gif") || end.equals("png") || end.equals("jpeg")                || end.equals("bmp")) {            return getImageFileIntent(filePath);        } else if (end.equals("apk")) {            return getApkFileIntent(filePath);        } else if (end.equals("ppt")) {            return getPptFileIntent(filePath);        } else if (end.equals("xls")) {            return getExcelFileIntent(filePath);        } else if (end.equals("doc")) {            return getWordFileIntent(filePath);        } else if (end.equals("pdf")) {            return getPdfFileIntent(filePath);        } else if (end.equals("chm")) {            return getChmFileIntent(filePath);        } else if (end.equals("txt")) {            return getTextFileIntent(filePath, false);        } else {            return null;        }    }    // Android获取一个用于打开所有类型文件的intent ，会调用手机安装的全部软件       public static Intent getAllIntent(String param) {        Intent intent = new Intent();        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(android.content.Intent.ACTION_VIEW);        Uri uri = Uri.fromFile(new File(param));        intent.setDataAndType(uri, "*/*");        return intent;    }    // Android获取一个用于打开APK文件的intent        public static Intent getApkFileIntent(String param) {        Intent intent = new Intent();        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(android.content.Intent.ACTION_VIEW);        Uri uri = Uri.fromFile(new File(param));        intent.setDataAndType(uri, "application/vnd.android.package-archive");        return intent;    }    // Android获取一个用于打开VIDEO 视频 文件的intent        public static Intent getVideoFileIntent(String param) {        Intent intent = new Intent("android.intent.action.VIEW");        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        intent.putExtra("oneshot", 0);        intent.putExtra("configchange", 0);        Uri uri = Uri.fromFile(new File(param));        intent.setDataAndType(uri, "video/*");        return intent;    }    // Android获取一个用于打开 音频文件的intent        public static Intent getMusicFileIntent(String param) {        Intent intent = new Intent("android.intent.action.VIEW");        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        intent.putExtra("oneshot", 0);        intent.putExtra("configchange", 0);        Uri uri = Uri.fromFile(new File(param));        // 通过file文件去获得content的uri                intent.setDataAndType(uri, "audio/*");        return intent;    }    // Android获取一个用于打开Html文件的intent        public static Intent getHtmlFileIntent(String param) {        Uri uri = Uri.parse(param).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(param).build();        Intent intent = new Intent("android.intent.action.VIEW");        intent.setDataAndType(uri, "text/html");        return intent;    }    // Android获取一个用于打开图片文件的intent        public static Intent getImageFileIntent(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, "image/*");        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;    }    // 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CHM文件的intent        public static Intent getChmFileIntent(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/x-chm");        return intent;    }    // Android获取一个用于打开文本文件的intent        public static Intent getTextFileIntent(String param, boolean paramBoolean) {        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        if (paramBoolean) {            Uri uri1 = Uri.parse(param);            intent.setDataAndType(uri1, "text/plain");        } else {            Uri uri2 = Uri.fromFile(new File(param));            intent.setDataAndType(uri2, "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;    }}
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