intent = FileUtils.openFile(this,filePath);
startActivity(intent);
break;
case R.id.button_xls:
filePath = “/storage/emulated/0/新建 XLS 工作表.xls”;
intent = FileUtils.openFile(this,filePath);
startActivity(intent);
break;
case R.id.button_doc:
filePath = “/storage/emulated/0/新建 DOC 文档.doc”;
intent = FileUtils.openFile(this,filePath);
startActivity(intent);
break;
}
}
}
2.FileUtils.java中：
public class FileUtils {
//打开类型的文件
public static Intent openFile(Context context, String filePath) {
if (filePath == null) {
return null;
}
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();
end = end.trim().toLowerCase();
// System.out.println(end);
/* 依扩展名的类型决定MimeType */
if (end.equals(“apk”)) {
return getApkFileIntent(c
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ontext,filePath);
} else if (end.equals(“ppt”)) {
return getPptFileIntent(context,filePath);
} else if (end.equals(“xls”)) {
return getExcelFileIntent(context,filePath);
} else if (end.equals(“doc”)) {
return getWordFileIntent(context,filePath);
} else if (end.equals(“pdf”)) {
return getPdfFileIntent(context,filePath);
} else if (end.equals(“txt”)) {
return getTextFileIntent(context,filePath, false);
} else {
return getAllIntent(context,filePath);
}
}
// Android获取一个用于打开APK文件的intent
public static Intent getApkFileIntent(Context context,String param) {
Intent intent = new Intent(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, new File(param));
intent.setDataAndType(contentUri, “application/vnd.android.package-archive”);
} else {
intent.setDataAndType(Uri.fromFile(new File(param)), “application/vnd.android.package-archive”);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
return intent;
}
// Android获取一个用于打开PPT文件的intent
public static Intent getPptFileIntent(Context context,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));
Uri uri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, 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(Context context,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));
Uri uri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, 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(Context context,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));
Uri uri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, new File(param));
intent.setDataAndType(uri, “application/msword”);
return intent;
}
// Android获取一个用于打开PDF文件的intent
public static Intent getPdfFileIntent(Context context,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));
Uri uri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, new File(param));
intent.setDataAndType(uri, “application/pdf”);
return intent;
}
// Android获取一个用于打开文本文件的intent
public static Intent getTextFileIntent(Context context,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));
Uri uri2 = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, new File(param));
intent.setDataAndType(uri2, “text/plain”);
}
return intent;
}
// Android获取一个用于打开APK文件的intent
public static Intent getAllIntent(Context context,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));
Uri uri = FileProvider.getUriForFile(context, “com.filepath.intent.fileprovider”, new File(param));
intent.setDataAndType(uri, “/”);
return intent;
}
}
3.fileprovider.java中