举例说明Android运行时权限用法

朴灿烈づ我的快乐病毒、 2022-07-12 05:41 163阅读 0赞

运行时权限是API-23时候新加的，允许在运行时动态授予权限

\#\#废话不多说，直接上代码

public static final int MULTIPLE_PERMISSIONS = 10; // code you want.
    
    String[] permissions = new String[] {
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.CAMERA,
        Manifest.permission.ACCESS_COARSE_LOCATION,
        Manifest.permission.ACCESS_FINE_LOCATION
    };
    
    @Override
    void onStart() {
        if (checkPermissions())
            // permissions granted.    
        } else {
            // show dialog informing them that we lack certain permissions
        }
    }
    
    private boolean checkPermissions() {
        int result;
        List<String> listPermissionsNeeded = new ArrayList<>();
        for (String p:permissions) {
            result = ContextCompat.checkSelfPermission(getActivity(),p);
            if (result != PackageManager.PERMISSION_GRANTED) {
                listPermissionsNeeded.add(p);
            }
        }
        if (!listPermissionsNeeded.isEmpty()) {
            ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), MULTIPLE_PERMISSIONS);
            return false;
        }
        return true;
    }
    
    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MULTIPLE_PERMISSIONS:{
                if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    // permissions granted.
                } else {
                    // no permissions granted.
                }
                return;
            }
        }
    }

So easy！！！