android 开发 获取各种intent （图片、apk文件、excel、pdf等文件）

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 getAudioFileIntent(filePath);
        }else if(end.equals("3gp")||end.equals("mp4")){
            return getAudioFileIntent(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 getAllIntent(filePath);
        }
    }
    
    //Android获取一个用于打开APK文件的intent
    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AUDIO文件的intent
    public static Intent getAudioFileIntent( 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, "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;   
    }