前言

在Android7.0之前打开第三方文件是很简单的事情，（如下方这样可直接打开）,但是Android 7.0之后我们会发现程序会直接闪退

报错

android.os.FileUriExposedException: 
file:///storage/emulated/0/updata.apk exposed beyond app through Intent.getData()

然后经过网上一番查找，就会查到FileProvider的相关解决方案，什么修改manifest、provider什么之类的，然后我们越踩越深，到头来什么问题都没有解决,无奈只好自己亲手持刀操作了

解决方案

此方法适合用FileProvider仍没有解决的同胞们，亦或者直接用此方法:比较流氓的方法，绕过7.0的文件权限检查

这里以打开text文本为例

try {
       Uri uri = null;
       if (Build.VERSION.SDK_INT >= 24) {
          StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
          StrictMode.setVmPolicy(builder.build());
          uri = Uri.fromFile(file1);
       } else {
          uri = Uri.fromFile(file1);
        }
          Intent intent = new Intent(Intent.ACTION_VIEW);
           intent.addCategory(Intent.CATEGORY_DEFAULT);
           intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
           intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
           intent.setDataAndType(uri, "text/plain");
           startActivity(intent);
        } catch (Exception e) {
           e.printStackTrace();
       }

6.0之前打开文件方式

public class MyIntent {  
    //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获取一个用于打开音频文件的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;  
    }  
}