Intent打开各种类型文件

/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; 
  }