【android】：android知道包名打开另一个应用

- 日理万妓 2022-09-21 11:42 160阅读 0赞

知道的自然就知道，这个函数，把包名传进去，就能打开另一个应用了

private void doStartApplicationWithPackageName(String packagename) {  
    
            // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等 
            PackageInfo packageinfo = null;  
            try {  
                packageinfo = getPackageManager().getPackageInfo(packagename, 0);  
            } catch (NameNotFoundException e) {  
                e.printStackTrace();  
            }  
            if (packageinfo == null) {  
                return;  
            }  
    
            // 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent 
            Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);  
            resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);  
            resolveIntent.setPackage(packageinfo.packageName);  
    
            // 通过getPackageManager()的queryIntentActivities方法遍历 
            List<ResolveInfo> resolveinfoList = getPackageManager()  
                    .queryIntentActivities(resolveIntent, 0);  
    
            ResolveInfo resolveinfo = resolveinfoList.iterator().next();  
            if (resolveinfo != null) {  
                // packagename = 参数packname 
                String packageName = resolveinfo.activityInfo.packageName;  
                // 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式：packagename.mainActivityname] 
                String className = resolveinfo.activityInfo.name;  
                // LAUNCHER Intent 
                Intent intent = new Intent(Intent.ACTION_MAIN);  
                intent.addCategory(Intent.CATEGORY_LAUNCHER);  
    
                // 设置ComponentName参数1:packagename参数2:MainActivity路径 
                ComponentName cn = new ComponentName(packageName, className);  
    
                intent.setComponent(cn);  
                startActivity(intent);  
            }  
        }

致此，亲测好用～