import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
 
import java.io.File;
import butterknife.Bind;
import butterknife.ButterKnife;
/**
 * 建立新的資料夾
 */
public class Main14Activity extends AppCompatActivity {

    @Bind(R.id.main14_btn)
    Button main14Btn;
    private final int REQUESTCODE = 101;
@Override
protected void onCreate(Bundle savedInstanceState) {
        super
 
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main14);
ButterKnife.bind(this);
main14Btn.setOnClickListener(new View.OnClickListener() {
            @Override
public void onClick(View v) {
                test();
}
        });
}

    @Override
public void onRequestPermissionsResult
 
(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUESTCODE) {
            if (permissions[0].equals(Manifest.permission.WRITE_EXTERNAL_STORAGE) && grantResults[0]
                    == PackageManager.PERMISSION_GRANTED) {
                //使用者同意
test();
} else {
                //使用者不同意
}
        }
    }

    private void test() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            int checkSelfPermission = checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
            if (checkSelfPermission == PackageManager.PERMISSION_DENIED) {
                requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUESTCODE);
}
        }
        File appDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath() + "/mPic");
        if (!appDir.exists()) {
            boolean isSuccess = appDir.mkdirs();
Log.d("isSuccess:" ,"----------0------------------"+isSuccess);
}
    }
}